JP2010201043A - Diamond and imitation gem thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diamond, allowing viewing of an arrow pattern and a heart pattern at the same time in a crown part under a predetermined condition. <P>SOLUTION: In this diamond, when incident light from a table or a crown is reflected on one side pavilion and it is again reflected on the other side pavilion to produce outgoing light, an upper V-shaped line of the heart pattern is formed by a boundary line in the vicinity of a girdle facet point of adjacent pavilion facets. When outgoing light is transmitted through the crown and emitted, a lower V-shaped line of a heart pattern and the other lines of the heart pattern are formed by a boundary line of a star facet formed on the crown, thereby the heart pattern is visually recognized as well as the arrow pattern on the crown part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a diamond capable of visually recognizing a heart and arrow pattern when a predetermined gem scope is used, and an imitation gem thereof.

A diamond, in particular a diamond, has a substantially frustoconical crown having a flat table, a substantially conical pavilion having a sharp curette, and a band-like girdle on the boundary surface between the crown and the pavilion. Yes. As shown in FIG. 12, the most common diamond 110 has a table 114, eight bezel facets 120, eight star facets 118, and sixteen upper girdle facets 122 on the crown 111 side. On the side of the pavilion 112, it is cut so that it has eight faces of the curette 124, the pavilion main facet 126, and 16 faces of the lower girdle facet 125, and is usually called a round brilliant cut.

Also, among the diamonds 110 that are ideally cut, the bezel facet 120 is inclined around 34 degrees with respect to the horizontal plane α assumed by the girdle 113, and similarly, the pavilion main facet 126 is 40.8. It tilts around degrees.

Then, as shown in FIG. 13, a hole 132 for looking into the diamond is formed at the tip, a semi-transparent cap part 133 for taking in white light is provided in the middle, and the taken-in light is provided at the root. If a predetermined jewel scope 130 provided with a colored peripheral portion 134 is used to color the surface of the diamond 110 and the diamond 110 is placed horizontally and covered from above, an excellent cut shape is obtained. As shown in FIG. 14, the diamond 110 can visually recognize the eight arrow patterns C (projected image) like a shadow on the crown 111 side and the eight heart patterns D (projected image) like a shadow on the pavilion 112 side. It is empirically known that it can be done.

This heart-and-arrow pattern is an effective sales tool for explaining price differences in diamonds of the same weight as proof of an excellent cut shape, and is therefore actively used for sales talks in stores such as retail stores.

JP 2005-073719 A

However, since the arrow pattern C is only visible on the crown 111 side and the heart pattern D is only visible on the pavilion 112 side, the direction of the diamond 110 must be changed (from the face-up direction to the face-down direction). ) It was impossible to see the heart and arrow at the same time.

Therefore, once the diamond 110 is attached to the base of the accessory such as a pendant in the face-up direction (direction in which the crown 111 is the front side), the diamond 110 cannot be turned upside down. Inconveniently, the heart pattern D on the side of the pavilion 112 cannot be viewed at all.

Therefore, even a diamond with an excellent cut can only visually recognize the arrow pattern C under limited-condition lighting in the jewelry that is actually used, and the general customer is simply satisfied with the purchase of the jewelry. I stayed.

The present invention is intended to provide a diamond and its imitation jewel that can visually recognize not only the arrow pattern C but also the heart pattern D on the crown portion when a predetermined jewel scope is used.

In order to solve the above-mentioned problem, the present invention described in claim 1 includes a crown having a substantially truncated cone shape or a truncated pyramid shape having a flat table at the upper center, and a sharp curette at the bottom center. It consists of a pavilion that has a conical shape or a substantially pyramid shape, and a band-like girdle on the boundary surface between the crown and the pavilion. The diamond and its imitation jewel are characterized by being a diamond and its imitation jewel capable of visually recognizing a heart pattern between the arrow patterns. Further, in the present invention described in claim 2, when incident light from the table or the crown is reflected by one pavilion and re-reflected by the opposite pavilion to generate outgoing light, they are adjacent to each other. A V-shaped line above the heart pattern is formed by a boundary line in the vicinity of the mesh point of the pavilion facet, and when the emitted light passes through the crown and is emitted, the boundary line of the facet formed in the crown When the V-shaped line below the heart pattern and the remaining lines of the heart pattern are formed and observed from the face-up direction using a jewel scope, both lines may be connected to visually recognize the heart pattern. The diamond according to claim 1 and its imitation jewelry.

According to a third aspect of the present invention, on the crown side, the table is formed in a substantially decagon shape, and is formed in a substantially trapezoidal shape with each side of the table as a base from the table toward the girdle. The second bezel facet 10 surface, the star facet 10 surface formed in a substantially rhombus shape with the side of the adjacent second bezel facet as the lower side and facing the girdle, and the head of the second bezel facet as the base From the contact point of the first bezel facet 10 surface having the upper side of the star facet as the lower side and the apex in contact with the girdle and formed in a substantially pentagonal shape, and the side contact of the adjacent first bezel facet 10 upper parting lines drawn toward a substantially middle position on the girdle of the contact point between the apex of the adjacent first bezel facet and the girdle, and And a upper girdle facets 20 face formed substantially inverted triangle with the upper side and the girdle of the first bezel facet in contact,
On the pavilion side, 10 lower parting lines formed from the contact point between the upper parting line and the girdle toward the curette, and the apex of the first bezel facet and a grid provided on the lower parting line A lower girdle facet 20 surface formed in a substantially inverted triangle connecting points, and a pavilion facet formed in a substantially rhombus shape with the lower side of the adjacent lower girdle facet as the upper side and the lower parting line as the lower side The diamond according to claim 1 or 2 and 10 imitation gemstones having 10 faces.

Further, in the present invention described in claim 4, on the crown side, the table is formed in a substantially regular octagon, and from the table toward the girdle, the table has a substantially trapezoidal shape with each side of the table as a base. The formed second bezel facet 8 surface, the star facet 8 surface formed in a substantially rhombus shape with the side of the adjacent second bezel facet as the lower side, and the head of the second bezel facet The side of the first bezel facet that is adjacent to the first bezel facet and the side face of the first bezel facet that is formed in a substantially pentagonal shape with the upper side of the star facet as the lower side and the apex in contact with the girdle. Eight upper parting lines drawn between the apex of the adjacent first bezel facet and the girdle on the girdle from the contact and the adjacent First and a upper girdle facets 16 face formed substantially inverted triangle with the upper side and the girdle bezel facets,
On the pavilion side, eight lower parting lines formed by connecting the curettes from the contact points of the upper parting line and the girdle, the apex of the first bezel facet, and a grid provided on the lower parting line The lower girdle facet 16 face that is formed in a substantially inverted triangle connecting the points, and the pavilion facet formed in a substantially rhombus shape with the lower side of the adjacent lower girdle facet as the upper side and the lower parting line as the lower side The diamond according to claim 1 or 2 having 8 faces, and imitation jewelry thereof.

According to the fifth aspect of the present invention, on the crown side, the table is formed in a substantially regular hexagon, and is formed in a substantially trapezoidal shape with each side of the table as a base from the table toward the girdle. The second bezel facet 10 surface, the star facet 10 surface formed in a substantially rhombus shape toward the girdle with the side of the adjacent second bezel facet as the lower side, and the head side of the second bezel facet A first bezel facet 10 surface having a bottom side, the upper side of the star facet as a lower side, and a vertex in contact with the girdle and formed in a substantially pentagonal shape, and a contact point between adjacent side sides of the first bezel facet 10 upper parting lines drawn toward the substantially middle position on the girdle of the contact point between the apex of the adjacent first bezel facet and the girdle And a upper girdle facets 20 face formed substantially inverted triangle with the upper side and the girdle of the first bezel facet adjacent,
On the pavilion side, the ten first lower parting lines formed from the contact points between the upper parting line and the girdle toward the curette, and the cue points from the apex of the first bezel facet and the girdle. It is formed in a substantially quadrangular shape by connecting ten second lower parting lines assumed to go to the let, a grid point provided on the first lower parting line, and a tip point provided on the second lower parting line. 3. A lower girdle facet 20 surface and a pavilion facet 10 surface formed in a substantially diamond shape with the lower side of the adjacent lower girdle facet as an upper side and the first lower parting line as a lower side. It is the diamond described in 1. and its imitation jewel.

According to the sixth aspect of the present invention, on the crown side, the table is formed in a substantially octagonal shape, and is formed in a substantially trapezoidal shape with each side of the table as a base from the table toward the girdle. The second bezel facet 8 surface, the side face of the adjacent second bezel facet as a lower side, the star facet 8 surface formed in a substantially diamond shape toward the girdle, and the head side of the second bezel facet From the contact of the first bezel facet 8 surface which is formed as a base, the upper side of the star facet is the lower side and the apex is in contact with the girdle and formed in a substantially pentagonal shape, and the side of the adjacent side of the first bezel facet Eight upper parting lines drawn by connecting approximately the middle positions on the girdle of the contact points between the adjacent first bezel facets and the girdle and the adjacent first bezel facets. And a upper girdle facets 16 face formed substantially inverted triangle with the upper side and the girdle bezel facets,
On the pavilion side, the eight first dividing lines formed from the contact points of the upper dividing line and the girdle toward the curette, and the cue points from the apex of the first bezel facet and the girdle contact point. It is formed in a substantially quadrilateral shape by connecting eight second lower parting lines assumed to go to the let, a grid point provided on the first lower parting line, and a tip point provided on the second lower parting line. 3. A lower girdle facet 16 surface and a pavilion facet 8 surface formed in a substantially rhombus shape with the lower side of the adjacent lower girdle facet as the upper side and the first lower parting line as the lower side. It is the diamond described in 1. and its imitation jewel.

In addition, according to the seventh aspect of the present invention, a ratio of a distance from the girdle to the mesh point on the lower parting line and a distance from the mesh point to the curette is 55:45 to 80:20. 7. The diamond according to claim 3 and its imitation jewel within the range. In addition, according to the present invention, the ratio of the distance from the girdle to the tip point and the distance from the tip point to the culet is 40:60 to 1 on the second lower parting line. The diamond and the imitation jewel according to claim 5, which are within a range of 99.

A ninth aspect of the present invention is an accessory to which the diamond according to the first to eighth aspects and the imitation jewelry are attached.

According to the present invention, it is possible to visually recognize both a heart pattern and an arrow pattern on the crown side of diamond or the like using a predetermined jewel scope. Therefore, it can be confirmed that the cut shape is excellent without changing the viewing direction of diamond or the like (only in the face-up direction). In addition, a beautiful arrow pattern can be visually recognized without missing the tip on the crown side of diamond or the like. Furthermore, diamonds attached to jewelry can be visually recognized as they are under the specified lighting conditions, and the general consumers who have purchased the jewelry can get satisfaction after purchase. You can also.

Hereinafter, preferred embodiments of an accessory according to the present invention will be described in detail with reference to the drawings. 1A is a plan view showing a first diamond according to the present invention, FIG. 1B is a bottom view thereof, and FIG. 1C is a side view thereof. 2A is a plan view showing the inclination angle of the cut surface of the first diamond, and FIG. 2B is a bottom view thereof. 3 is an explanatory diagram showing an example of a path of incident light that embodies a heart pattern in the first diamond, FIG. 4 is an explanatory diagram showing a heart-and-arrow pattern visually recognized on the crown of the first diamond, and FIG. FIG. 3 is a plan view showing a first diamond attached to a pendant.

The first diamond 10 is mainly composed of natural diamond, synthetic diamond, or the like, for example. However, the first diamond 10 is not limited thereto, and cubic zirconia can be obtained by adjusting the angle of the facet surface in relation to the refractive index. For example, imitation diamond and other transparent gemstones (including lightly colored ones) can be used as a material.

As shown in FIG. 1, the first diamond 10 includes a crown 11 having a substantially truncated cone shape (substantially trapezoidal cross section), a pavilion 12 having a substantially conical shape (substantially triangular section), a crown 11, and a pavilion 12. And a belt-like girdle 13 on the boundary circumferential surface.

On the crown 11 of the first diamond 10, a flat table 14 is formed in a substantially regular decagon at the center. Further, in the direction of the girdle 13 from the table 14, there are ten second bezel facets 16 formed in a substantially trapezoidal shape with each side of the table 14 as a base. Here, it is necessary to provide an angle difference between the horizontal plane α assumed by the girdle 13 formed in a substantially circumferential shape as a whole and the second bezel facet 16 and an angle difference with the first bezel facet 20 to be described later. In consideration of the point on which a part of the reflected image of the arrow pattern D from the pavilion facet 28 is projected, it is preferably formed at about 25 degrees.

The crown 11 has ten star facets 18 formed in a substantially rhombus shape with the side of the adjacent second bezel facet 16 as the lower side. Here, the inclination of the horizontal plane α assumed by the girdle 13 and the star facet 18 is preferably about 28 degrees in consideration of the point on which a reflection image of the V-shaped line in the vicinity of the mesh point of the pavilion facet 28 described later is projected. .

Further, the crown 11 has a first bezel facet 20 formed in a substantially pentagonal shape with the top side of the second bezel facet 16 as the bottom side, the upper side of the star facet 18 as the lower side, and the apex in contact with the girdle 13. It has 10 faces. Here, the inclination of the horizontal plane α assumed by the girdle 13 and the first bezel facet 20 needs to be different from that of the second bezel facet 16, and the star facet 18 and the upper girdle facet 22 are each about 28 degrees. In consideration of a point that is approximately 39 degrees and a point on which a reflected image of an arrow pattern D of the pavilion facet 28 to be described later is projected, it is desirable that the angle is approximately 34 degrees.

In addition, the crown 11 is connected to an upper parting line X formed by connecting an intermediate point 15B located approximately in the middle of the apex of the first bezel facet 20 on the girdle 13 from the contact point 15A of the adjacent first bezel facet 20. There are 20 upper girdle facets 22 formed in a substantially inverted triangle by the upper side of one bezel facet 20 and the girdle 13.

On the other hand, a sharp cullet 24 is formed substantially in the center of the pavilion 12 of the first diamond 10. Then, the upper parting line X on the crown 11 side is extended to the pavilion 12 side as it is and connected to the curette 24, and the grid point Z provided on the lower parting line Y with a predetermined distance. There are 20 lower girdle facets 26 formed in a substantially inverted triangle connecting the intermediate points 25B of the lower parting line Y on the adjacent girdle 13.

Here, the inclination of the horizontal plane α assumed by the girdle 13 and the lower girdle facet 26 needs to be provided with an angle difference from the pavilion facet 28 so that a V-shaped line clearly appears in the vicinity of a contact point B of the pavilion facet 28 described later. Considering the point, about 42 degrees is desirable.

The pavilion 12 has ten pavilion facets 28 formed in a substantially rhombus shape with the lower side of the adjacent lower girdle facets 26 as the upper side and the lower parting line Y as the lower side. Here, the inclination of the horizontal plane α assumed by the girdle 13 and the pavilion facet 28 is that the inclination of a similar pavilion facet in an ideal cut (ideal cut) of a general round brilliant cut is about 40.8 degrees. Considering this, it is desirable that the film be formed at about 40.8 degrees.

The grid point Z is a boundary point between the lower girdle facet 26 and the pavilion facet 28 on the lower parting line Y. The position of the grid point Z in the first diamond 10 is the length from the girdle 13 to the grid point Z on the lower parting line Y in consideration of the point where the heart pattern C to be described later should be clearly projected on the star facet 18. It is preferable that the ratio of the length Y1 from the grid point Z to the curette 24 is in the range of 55:45 to 80:20, particularly about 63:37 (FIG. 2).

In order to visually recognize the heart and arrow pattern in the first diamond 10 as described above, the jewel scope 130 used for the round brilliant cut diamond is used as it is, and the first diamond 10 is mounted almost horizontally in the face-up direction. It is only necessary to cover it from above in the placed state.

Here, when light is incident on the table 14 substantially parallel to the horizontal plane α assumed by the girdle 13 at an angle smaller than 90 degrees, the inside of the first diamond 10 is slightly in the direction of the girdle 13 in relation to the refractive index of the diamond. The transmitted light E is refracted in the (outward direction) and is reflected at an angle at which the pavilion facet 28A on one side contacts the pavilion facet 28B on the opposite side. Then, when the reflected light F comes into contact with the pavilion facet 28B, an upward re-reflected light G is generated. At this time, an angle with the lower girdle facet 26 is formed in the vicinity B of the mesh point of the adjacent pavilion facets 28. Since the V-shaped line due to the difference is formed, the re-reflected light G includes the projected image of the V-shaped line.

Further, the re-reflected light G passes through the inside of the first diamond 10 in the outward direction. When the re-reflected light G comes into contact with the star facet 18, the V-shaped line described above is formed on the star facet 18. The projected image shows the V-shaped line above the heart pattern. On the other hand, the star facet 18 is originally formed in a substantially rhombus shape and has an angle difference with the second bezel facet 16, so both sides on the lower side of the star facet 18 (boundary line with the second bezel facet 16). ) Shows the V-shaped line (the tip of the heart pattern) below the heart pattern. Similarly, the upper side edges of the star facet 18 (boundary lines with the first bezel facet 20) form the remaining heart-shaped lines (lines connecting the upper and lower V-shaped lines). Therefore, a heart-shaped whole line is formed on the star facet 18.

The outgoing light H including the projected image of the heart line is slightly refracted in the direction of the curette 24 (inward) in relation to the refractive index of the diamond 2.417, and is emitted approximately 90 degrees from the first diamond 10. Since it is emitted at the corners, when the first diamond 10 is viewed through the opening 132 of the jewel scope 130, the ten heart patterns C can be visually recognized in the vicinity A of the star facet.

In addition, in the first diamond 10, the first bezel facet 20, which is the largest facet surface in the crown 11, is formed around 34 degrees with respect to the horizontal plane α assumed from the girdle 13, and the pavilion facet 28 in the pavilion 12 is about Since it is formed around 40.8 degrees, it is an ideal cut shape of diamond. Therefore, almost in the same way as in the case of a normal diamond, the reflected light from the pavilion facet 28 is projected onto the first bezel facet 20 as an arrow pattern D (because the inclination angle of the facet surface is different, the projected image is A part of the arrow pattern D is projected on the second bezel facet 16 while producing a slightly horizontal step.)

Therefore, when the first diamond 10 is viewed from above through the opening 132 of the jewel scope 130, ten arrow patterns D can be visually recognized on the crown 11.

That is, in the first diamond 10, the ten heart patterns C and the ten arrow patterns D are alternately positioned on the crown 11 and can be visually recognized at the same time, and an excellent cut can be proved.

In addition, for example, the first diamond 10 attached to the pendant 30 can visually recognize the heart pattern C and the arrow pattern D as it is, and can realize a beautiful pattern as if a kaleidoscope.

In FIG. 6, (a) is a plan view showing a second diamond according to the present invention, and (b) is a bottom view thereof. FIG. 7 is a diagram showing a heart and arrow pattern visually recognized on the crown of the second diamond.

The second diamond 40 includes a crown 41 having a substantially decagonal pyramid shape (substantially trapezoidal cross section), a pavilion 42 having a substantially decagonal pyramid shape (substantially triangular cross section), and a boundary peripheral surface between the crown 41 and the pavilion 42. And a belt-like girdle 43.

Similar to the first diamond 10, the crown 41 is formed with a flat table 44 at the center in a substantially regular decagon shape. In addition, there are ten second bezel facets 46 formed in a substantially trapezoidal shape with each side of the table 44 as a base in the direction of the girdle 43 from the table 44. Here, the point that the inclination of the horizontal plane α (not shown) assumed by the girdle and the second bezel facet 46 is desirably about 25 degrees is the same as that of the first diamond 10.

The crown 41 has ten star facets 48 formed in a substantially rhombus shape with the side of the adjacent second bezel facet 46 as the lower side, and the horizontal plane α assumed by the girdle 43 and the inclination of the star facet 48 As with the first diamond 10, it is desirable that the angle is about 28 degrees.

Further, the crown 41 has a first bezel facet 50 formed in a substantially pentagonal shape with the top side of the second bezel facet 46 as the bottom side, the upper side of the star facet 48 as the lower side, and the apex in contact with the girdle 43. Like the first diamond 10, the angle between the horizontal plane α assumed by the girdle 43 and the first bezel facet 50 is preferably about 34 degrees.

In addition, the crown 41 is connected to an upper part of the first bezel facet 50 and an upper parting line X formed by connecting a substantially middle position of the apex of the first bezel facet 50 on the girdle 43 from a contact point of the adjacent first bezel facet 50. The upper girdle facet 52 formed in a substantially inverted triangle by the sides and the girdle 43 has 20 faces, and the angle between the horizontal plane α assumed by the girdle 43 and the upper girdle facet 52 is preferably about 39 degrees. The same as the first diamond 10.

On the other hand, a sharp cullet 54 is formed substantially in the center of the pavilion 42 of the second diamond 40. And the upper parting line X in the crown 41 side is extended to the pavilion 42 side as it is and the lower parting line Y formed by connecting the curette 54 and the grid point provided on the lower parting line Y with a predetermined distance. There are 20 lower girdle facets 55 formed in a substantially inverted triangle connecting Z and the midpoint of the lower parting line Y on the adjacent girdle 43. Here, the point that the inclination of the horizontal plane α assumed by the girdle 43 and the lower girdle facet 55 is preferably about 42 degrees is the same as the first diamond 10.

Further, the pavilion 42 has ten faces of pavilion facets 56 formed in a substantially rhombus shape with the lower side of the adjacent lower girdle facet 55 as the upper side and the lower parting line Y as the lower side, and is assumed by the girdle. Similar to the first diamond 10, the angle between the horizontal plane and the pavilion facet is preferably about 40.8 degrees.

Note that the ratio of the length from the girdle 43 to the grid point Z to the preferred length from the grid point Z to the curette 54 on the lower parting line Y of the grid point Z of the second diamond 40 is also the same as that of the first diamond 10. It is the same.

Therefore, when the second diamond 40 is viewed from above through the opening 132 of the jewel scope 130, similarly to the first diamond 10, ten heart patterns C and ten arrow patterns D are alternately positioned on the crown 41 side. At the same time, it is possible to draw a beautiful projected image that looks like a kaleidoscope.

8A is a plan view showing a third diamond according to the present invention, and FIG. 8B is a bottom view thereof. FIG. 9 is a diagram showing a heart and arrow pattern visually recognized on the crown of the third diamond.

The third diamond 60 includes a crown 61 having a substantially frustum shape (substantially trapezoidal cross section), a pavilion 62 having a substantially conical shape (substantially triangular cross section), and a belt-like shape on the boundary circumferential surface between the crown 61 and the pavilion 62. The girdle 63 is provided.

Further, a flat table 64 is formed in the center of the crown 61 into a substantially regular octagon at the center. Further, in the direction from the table 64 to the girdle 63, there are eight second bezel facets 66 formed in a substantially trapezoidal shape with each side of the table 64 as a base. Here, the point that the inclination of the horizontal plane α (not shown) assumed by the girdle 63 and the second bezel facet 66 is desirably about 25 degrees is the same as that of the first diamond 10.

The crown 61 has eight star facets 68 formed in a substantially rhombus shape with the side of the adjacent second bezel facet 66 as the lower side, and the horizontal plane α assumed by the girdle 63 and the inclination of the star facet 68 As with the first diamond 10, it is desirable that the angle is about 28 degrees.

Further, the crown 61 has a first bezel facet 70 formed in a substantially pentagonal shape with the top side of the second bezel facet 66 as the base, the upper side of the star facet 68 as the lower side, and the apex in contact with the girdle 63. As with the first diamond 10, the angle between the horizontal plane α assumed by the girdle 63 and the first bezel facet 70 is preferably about 34 degrees.

In addition, the crown 61 is formed by connecting the upper parting line X formed on the upper side of the first bezel facet 70 from the contact point of the adjacent first bezel facet 70 and connecting the substantially middle position of the apex of the first bezel facet 70 on the girdle 63. There are 16 upper girdle facets 72 formed in a substantially inverted triangle by the sides and the girdle 63, and the angle between the horizontal plane α assumed by the girdle 63 and the upper girdle facet 72 is preferably about 39 degrees. The same as the first diamond 10.

On the other hand, a sharp cullet 74 is formed in the center of the pavilion 62 of the third diamond 60. Then, the upper parting line X on the crown 61 side is extended to the pavilion 62 side as it is, and the lower parting line Y formed by connecting the curette 74 and the grid point Z provided on the lower parting line Y with a predetermined distance. There are 16 lower girdle facets 75 formed in a substantially inverted triangle connecting the midpoints of the lower parting lines Y on the adjacent girdle 63. Here, the point that the inclination of the horizontal plane α assumed by the girdle 63 and the lower girdle facet 75 is preferably about 42 degrees is the same as the first diamond 10.

Further, the pavilion 62 has eight sides of a pavilion facet 76 formed in a substantially rhombus shape with the lower side of the adjacent lower girdle facet 75 as the upper side and the lower parting line Y as the lower side, and is assumed by the girdle 63. Similar to the first diamond 10, the inclination of the horizontal plane α and the pavilion facet 76 is preferably about 40.8 degrees.

The ratio of the length from the girdle 63 to the grid point Z to the preferred length from the grid point Z to the curette 74 on the lower parting line Y of the grid point Z of the third diamond 60 is the same as that of the first diamond 10. It is.

Therefore, when the third diamond 60 is viewed from above through the opening 132 of the gem scope 130, the number of hearts and arrows is reduced in relation to the number of faceted surfaces, but the crown side 61 is substantially the same as the first diamond 10. In addition, the pattern of 8 hearts C and the pattern of 8 arrows D can be alternately positioned and viewed simultaneously, and a beautiful projected image like a kaleidoscope can be drawn.

10A is a plan view of a fourth diamond according to the present invention, and FIG. 10B is a bottom view thereof. FIG. 11 is a diagram showing a heart-and-arrow pattern visually recognized on the crown of the fourth diamond.

The fourth diamond 80 includes a crown 81 having a substantially frustum trapezoidal shape (substantially trapezoidal cross section), a pavilion 82 having a substantially conical shape (substantially triangular shape in cross section), and a belt-like shape on a boundary peripheral surface between the crown 81 and the pavilion 82 And a girdle 83 of FIG.

Since the table 84, the star facet 88, the second bezel facet 86, and the first bezel facet 90 are formed on the crown 81 of the fourth diamond 80 in the same manner as the first diamond 10, the description thereof is omitted here. .

On the other hand, a sharp cullet 94 is formed substantially in the center of the pavilion 82 of the fourth diamond 80. The upper parting line X on the crown 81 side is extended to the pavilion 82 side as it is, the ten first lower parting lines Y1 formed toward the curette 94, the apex of the first bezel facet 90, and the girdle 83 Ten second lower parting lines Y2 assumed to go to the curette 94 from the contact points, the mesh points Z provided on the first lower parting line Y1, and the tip points V provided on the second lower parting line Y2. There are 20 lower girdle facets 95 formed in a substantially quadrangular shape. Here, the point that the inclination of the horizontal plane α assumed by the girdle 83 and the lower girdle facet 95 is preferably about 42 degrees is the same as the first diamond 10.

Further, the pavilion 82 has ten faces of pavilion facets 96 formed in a substantially rhombus shape with the lower side of the adjacent lower girdle facet 95 as the upper side and the first lower parting line Y1 as the lower side. Similar to the first diamond 10, it is desirable that the assumed angle between the horizontal plane α and the pavilion facet 96 is about 40.8 degrees.

Furthermore, the ratio of the distance from the girdle 83 to the grid point Z and the preferred distance from the grid point Z to the curette 94 on the first lower parting line Y1 of the grid point Z of the fourth diamond 80 is as follows. It is the same.

In addition, the tip point V of the fourth diamond 80 is, on the second lower parting line Y2, the ratio of the distance from the girdle 83 to the tip point V and the preferred distance from the tip point V to the culet 94 is 40: It is preferably in the range of 60 to 1:99, particularly about 15:85 (FIG. 10).

Here, the first diamond to the third diamond are referred to as a first bezel facet and a second bezel facet, whereas a general diamond that can visually recognize a conventional heart and arrow pattern has only one bezel facet. 2 bezel facets. Therefore, depending on the proportion of each diamond, the table tends to be smaller in the first to third diamonds compared to the conventional diamond (for example, the table diameter of the conventional diamond is the girdle diameter). (The first diamond has a table diameter of 45% to 55% of the girdle diameter.).

Here, in the conventional diamond, the light for projecting the tip of the arrow onto the bezel facet was mainly incident from the position of the table, but in the first diamond to the third diamond, the same light is located at the position of the second bezel facet. Since the light is more incident and is in contact with and reflected from the pavilion at different angles, there is a possibility that the position at which the light projects the tip of the arrow onto the first bezel facet is shifted. As a result, in the first diamond to the third diamond, an incomplete arrow pattern with a missing tip may be visually recognized.

Therefore, in the fourth diamond 80, the length of the pavilion facet 96 in the pavilion 82 is adjusted to be slightly shorter, so that the tip of the arrow pattern is projected onto the first bezel facet 90, and such a problem can be solved. .

Therefore, when the fourth diamond 80 is viewed from above through the opening 132 of the jewel scope 130, 10 heart C patterns and 10 complete arrow D patterns are alternately positioned on the crown 81 side and simultaneously viewed. You can draw a beautiful projected image like a kaleidoscope.

It should be noted that the method of adjusting the length of the pavilion facet slightly and visually recognizing a complete arrow pattern can be applied to the second diamond 40 and the third diamond 60 as well.

The present invention is not limited to the embodiment described above, and can be implemented with various modifications. That is, by using the boundary line in the vicinity of the mesh point of adjacent pavilion facets as the V-shaped line above the heart pattern, the heart pattern and the arrow pattern can be simultaneously recognized even in diamonds having different cut shapes.

In the above embodiment, only diamond is described, but not only diamond synthetic stone, but also transparent gems other than diamond (including thin colored ones), synthetic stones, and other imitation gems, The present invention can be applied by changing the angle of the facet surface in consideration of the refractive index.

In addition, the above description is only for a diamond whose overall cut shape is a substantially frustum trapezoid. However, for example, even if the whole of a regular decagon, a regular decagon, etc. Of course, any device having a surface is included in the technical scope of the present invention.

(A) is a top view which shows the 1st diamond which concerns on this invention, (b) is the bottom view, (c) is the side view. (A) is a top view which shows the inclination-angle of the cut surface of a 1st diamond, (b) is the bottom view. It is explanatory drawing which shows an example of the course of the incident light which embodies the heart pattern in a 1st diamond. It is a figure which shows the heart and arrow pattern visually recognized on the crown of a 1st diamond. It is a top view which shows the 1st diamond attached to the pendant. (A) is a top view which shows the 2nd diamond which concerns on this invention, (b) is the bottom view. It is a figure which shows the heart and arrow pattern visually recognized on the crown of a 2nd diamond. (A) is a top view which shows the 3rd diamond which concerns on this invention, (b) is the bottom view. It is a figure which shows the heart and arrow pattern visually recognized on the crown of a 3rd diamond. (A) is a top view of the 4th diamond which concerns on this invention, (b) is the bottom view. It is a figure which shows the heart and arrow pattern visually recognized on the crown of a 4th diamond. (A) is a plan view of a general diamond, (b) is a bottom view thereof, and (c) is a side view thereof. It is explanatory drawing which shows the scope for jewelry. (A) is a figure which shows the allo pattern in a general diamond, (b) is a figure which shows the heart pattern.

10 first diamond 11 crown 12 pavilion 13 girdle 14 table 15A contact 15B intermediate point 16 second bezel facet 18 star facet

20 First bezel facet 22 Upper girdle facet 24 Curette 25B Intermediate point 26 Lower girdle facet 28 Pavilion facet

30 pendants

40 second diamond 41 crown 42 pavilion 43 girdle 44 table 46 second bezel facet 48 star facet

50 First bezel facet 52 Upper girdle facet 54 Curette 55 Lower girdle facet 56 Pavilion facet

60 Third diamond 61 Crown 62 Pavilion 63 Girdle 64 Table 66 Second bezel facet 68 Star facet

70 First bezel facet 72 Upper girdle facet 74 Curette 75 Lower girdle facet 76 Pavilion facet

80 Fourth diamond 81 Crown 82 Pavilion 83 Girdle 84 Table 86 Second bezel facet 88 Star facet

90 1st bezel facet 94 curette 95 lower girdle facet 96 pavilion facet

110 Diamond 111 Crown 112 Pavilion 113 Girdle 114 Table 118 Star Facet

120 Bezel facet 122 Upper girdle facet 124 Cuelet 125 Lower girdle facet 126 Pavilion main facet

130 Gem Scope 132 Opening 132 Hole 133 Translucent Cap 134 Colored Surrounding

C Arrow pattern D Heart pattern E Transmitted light F Reflected light G Re-reflected light H Emitted light X Upper parting line Y Lower parting line Y1 First lower parting line Y2 Second lower parting line V Tip point Z Box point

Claims (9)

A crown having a substantially truncated cone shape or a truncated pyramid shape having a flat table in the upper center, a pavilion having a substantially cone shape or a substantially truncated pyramid shape having a sharp curette at the center of the bottom, the crown and the pavilion; It is composed of a band-like girdle on the boundary surface of the diamond, and when observing from the face-up direction using a jewel scope, a diamond pattern that can visually recognize an arrow pattern and its imitation jewel visually recognize a heart pattern between the arrow patterns. Diamond and its imitation jewelry characterized by being able to. When the incident light from the table or the crown is reflected by the one side pavilion and re-reflected by the opposite side pavilion to generate outgoing light, the heart pattern is formed by the boundary line near the grid point of the adjacent pavilion facets. When a V-shaped line above is formed and the emitted light is transmitted through the crown and emitted, the V-shaped line below the heart pattern and the heart pattern are formed by a facet boundary formed on the crown. The diamond according to claim 1, wherein the remaining lines are formed, and when viewed from the face-up direction using a jewel scope, both lines can be connected to visually recognize the heart pattern. That imitation jewel. On the crown side, the table is formed in a substantially regular decagon and is adjacent to the surface of the second bezel facet 10 formed in a substantially trapezoidal shape with each side of the table as a base from the table toward the girdle. The side face of the second bezel facet is the lower side and the star facet 10 surface is formed in a substantially diamond shape toward the girdle, and the top side of the second bezel facet is the bottom, and the upper side of the star facet is the bottom The side of the first bezel facet 10 whose apex is formed in a substantially pentagonal shape in contact with the girdle, and the apex of the adjacent first bezel facet from the contact point of the side of the adjacent first bezel facet Ten upper dividing lines drawn toward a substantially middle position on the girdle of the contact point with the girdle and the adjacent first bezel facet And a upper girdle facets 20 surfaces by the upper edge girdle is formed in a substantially inverted triangle,
On the pavilion side, 10 lower parting lines formed from the contact point between the upper parting line and the girdle toward the curette, and the apex of the first bezel facet and a grid provided on the lower parting line A lower girdle facet 20 face formed in a substantially inverted triangle connecting points, and a pavilion facet formed in a substantially rhombus shape with the lower side of the adjacent lower girdle facet as the upper side and the lower parting line as the lower side The diamond and its imitation jewelry according to claim 1 or 2, characterized by having 10 faces. On the crown side, the table is formed in a substantially octagonal shape, and is adjacent to the second bezel facet 8 surface formed in a substantially trapezoidal shape with each side of the table as a base from the table toward the girdle. The side face of the second bezel facet is the lower side and the star facet 8 surface is formed in a substantially rhombus shape toward the girdle, the top side of the second bezel facet is the bottom, and the upper side of the star facet is the bottom The first bezel facet 8 surface which is formed as a side and whose apex is in a substantially pentagonal shape in contact with the girdle, and the apex of the adjacent first bezel facet from the contact of the side of the adjacent first bezel facet 8 upper parting lines drawn by connecting approximately the middle positions on the girdle of the contact point with the girdle, and the upper side and front side of the adjacent first bezel facet And a upper girdle facets 16 face formed substantially inverted triangle with the girdle,
On the pavilion side, eight lower parting lines formed from the contact point between the upper parting line and the girdle toward the curette, the apex of the first bezel facet, and a grid provided on the lower parting line The lower girdle facet 16 face that is formed in a substantially inverted triangle connecting the points, and the pavilion facet formed in a substantially rhombus shape with the lower side of the adjacent lower girdle facet as the upper side and the lower parting line as the lower side The diamond and imitation jewelry thereof according to claim 1, wherein the diamond and the imitation gemstone have 8 faces. On the crown side, the table is formed in a substantially regular decagon and is adjacent to the surface of the second bezel facet 10 formed in a substantially trapezoidal shape with each side of the table as a base from the table toward the girdle. The side face of the second bezel facet is the lower side and the star facet 10 surface is formed in a substantially diamond shape toward the girdle, and the top side of the second bezel facet is the bottom, and the upper side of the star facet is the bottom The side of the first bezel facet 10 whose apex is formed in a substantially pentagonal shape in contact with the girdle, and the apex of the adjacent first bezel facet from the contact point of the side of the adjacent first bezel facet Ten upper dividing lines drawn toward a substantially middle position on the girdle of the contact point with the girdle and the adjacent first bezel facet And a upper girdle facets 20 surfaces by the upper edge girdle is formed in a substantially inverted triangle,
On the pavilion side, ten first lower parting lines formed from the contact point between the upper parting line and the girdle toward the curette, and the top part of the first bezel facet and the contact point between the girdle. 10 lower lower parting lines that are supposed to go to the lower part, a grid point that is provided on the first lower parting line, and a tip point that is provided on the second lower parting line. A girdle facet 20 surface and a pavilion facet 10 surface formed in a substantially rhombus shape with the lower side of the adjacent lower girdle facet as an upper side and the first lower parting line as a lower side. Item 3. The diamond according to item 1 or 2 and an imitation gem thereof. On the crown side, the table is formed in a substantially octagonal shape, and is adjacent to the second bezel facet 8 surface formed in a substantially trapezoidal shape with each side of the table as a base from the table toward the girdle. The side face of the second bezel facet is the lower side and the star facet 8 surface is formed in a substantially rhombus shape toward the girdle, the top side of the second bezel facet is the bottom, and the upper side of the star facet is the bottom The first bezel facet 8 surface which is formed as a side and whose apex is in a substantially pentagonal shape in contact with the girdle, and the apex of the adjacent first bezel facet from the contact of the side of the adjacent first bezel facet 8 upper parting lines drawn by connecting approximately the middle positions on the girdle of the contact point with the girdle, and the upper side and front side of the adjacent first bezel facet And a upper girdle facets 16 face formed substantially inverted triangle with the girdle,
On the pavilion side, eight first lower dividing lines formed from the contact points of the upper dividing line and the girdle toward the curette, and a cullet from the apex of the first bezel facet and the contact point of the girdle. A lower formed in a substantially quadrilateral shape by connecting eight second lower parting lines that are assumed to be directed to the upper side, a grid point provided on the first lower parting line, and a tip point provided on the second lower parting line 16. A girdle facet 16 surface, and a pavilion facet 8 surface formed in a substantially rhombus shape with the lower side of the adjacent lower girdle facet as an upper side and the first lower parting line as a lower side. Item 3. The diamond according to item 1 or 2 and an imitation gem thereof. A ratio of a distance from the girdle to the mesh point and a distance from the mesh point to the curette on the lower dividing line or the first lower dividing line is in a range of 55:45 to 80:20. The diamond according to claim 3 and its imitation jewelry. The ratio of the distance from the girdle to the tip point and the distance from the tip point to the culet on the second lower parting line is in the range of 40:60 to 1:99. To 6 and diamonds thereof. The jewelry which attached the diamond of the said Claim 1-8, and its imitation jewelry.

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