JP3078636U - Proportion of 101 face cut diamond - Google Patents

Abstract

(57) [Summary] [Problem] In the present invention, a light source incident on diamond is
While maximally reflecting on the table surface, it offers cut diamond proportions that take into account the appearance. SOLUTION: The girdle is a diamond in which a crown having a table surface provided on an upper part of the girdle is formed and a pavilion is formed on a lower part of the girdle, and a cut surface is provided on a bottom part of the pavilion, The cut surface is formed so as to be visible from the table surface. Further, a cut surface is formed on the girdle. Further, a cut of 33 faces is established in the crown, a cut of 24 faces is established in the girdle, a cut of 44 faces is established in the pavilion, and a cut of 101 faces is established as a whole.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to the shine of diamonds and the proportions of diamonds due to differences in diamond cuts.

[0002]

[Prior art]

 In general, there are four criteria for diamond quality: Crat, Color, Clarity, and Cut. Crat represents the weight of a gem such as a diamond. Color represents the degree of color depth. Clarity represents a minute flaw or inclusion included in the diamond. Cut represents the shine of the diamond. In the proportion of diamond in Cut described above, there are diamonds having various cut shapes. The usual diamond proportions include a girdle formed in a band shape, a crown formed in a trapezoidal shape on an upper portion of the girdle, and a pavilion formed in an inverted triangle shape on a lower portion of the girdle. As a proportion of this kind of diamond, a diamond formed by a 58-hedron round brilliant cut is well known and known. In the proportion of the 58-hedron brilliant cut, the crown is formed by a cut of 33 faces, and the pavilion is formed by a cut of 25 faces.

[0003]

[Problems to be solved by the invention]

 However, when a 58-hedral brilliant cut is conventionally formed, the girdle is given a certain width in order to hold down the diamond, thereby preventing reflection. When cutting diamonds, the girdle surface is fixed and cuts are performed. In that case, rosin is used on the girdle surface as a non-slip for holding down the diamond, so the rosin of the rosin remains on the girdle surface and impedes reflection as impurities.

[0004] An ideal cut diamond proportion is defined as a cut in which a light source incident on the diamond body is totally reflected on a table surface of a crown provided above the diamond and returns to the table surface. Shape.

[0005] In addition to the four criteria shown above, the appearance of the diamond proportion is very important.

[0006] Therefore, an object of the present invention is to provide a cut diamond proportion in which the light source incident on the diamond is reflected to the maximum extent on the table surface and the appearance is taken into consideration.

[0007]

[Means for Solving the Problems]

 Hereinafter, the present invention will be described. To facilitate understanding of the present invention, reference numerals in the accompanying drawings are added in parentheses, but the present invention is not limited to the illustrated form.

[0008] The invention of claim 1 is a diamond in which a girdle and a crown having a table surface provided on an upper part of the girdle are formed and a pavilion is formed on a lower part of the girdle. A cut surface is provided, and the cut surface is formed to be visible from the table surface.

The invention according to claim 2 is characterized in that the cut surface appears to rise from the table surface of the crown by irradiating the diamond with fluorescent light.

The invention according to claim 3 is characterized in that the shape of the cut surface is a cross shape.

According to these inventions, the cut surface is provided at the bottom of the pavilion so that the cut shape can be seen from the table surface, so that the diamond is excellent in design and gives a sense of quality. Also, by increasing the number of cuts, the reflection efficiency is improved and the brightness of the diamond is increased. In addition, when fluorescent light is applied to the diamond, the cut surface is reflected and the cross-shaped cut surface is projected from the table surface so that it is excellent in design.

The invention according to claim 4 is characterized in that a cut surface is formed on the girdle.

According to the present invention, it is possible to improve the reflection efficiency by increasing the number of cut surfaces of the girdle, thereby increasing the brightness of the diamond.

According to the invention of claim 5, a cut of 33 faces is established in the crown, a cut of 24 faces is established in the girdle, a cut of 44 faces is established in the pavilion, and a total of 101 faces is established. The cut is established and formed.

According to the present invention, the number of cut surfaces of the girdle and the pavilion is increased as compared with the conventional number of cut surfaces, and the cut surface of the girdle and the pavilion is made to be a total of 101 cut surfaces. Can be maximized. Further, it is possible to form a diamond in which light entering the crown table surface from all possible directions is totally reflected and returns to the table surface to the maximum.

[0016]

[Embodiment of the invention]

 Hereinafter, embodiments of the proportions of the 101-piece diamond cut according to the present invention will be described in detail. FIG. 1 shows an overall view of a 101-plane cut diamond proportion, FIG. 2 shows a plan view of a crown, and FIG. 3 shows a bottom view of a pavilion. The proportion of the 101-faced diamond 1 includes a girdle 3, a crown 2 formed on an upper part of the girdle 3, and a pavilion 4 formed on a lower part of the girdle 3.

The crown 2 has 33 cuts and a trapezoidal shape. The top of the crown 2 is centered on an octagonal table 5, as shown in FIG. Along each side of the table 5, eight triangular star facets 6... 6 each having a part of each side are formed around the table 5. Between the formed star facets 6..., A substantially rhombus-shaped upper main facet 7... 7 partially provided with one side forming the star facets 6. Eight faces are formed so as to surround the star facets 6. Furthermore, between the adjacent upper main facets 7 ... 7, one side forming the upper main facets 7 ... 7 from the intersection of the adjacent upper main facets 7 ... 7 toward the girdle direction. A reference line is provided to equally divide the area surrounded by the outer diameter line of the girdle 3 into two. A substantially triangular upper girdle facet 8... 8 is formed on both sides of the reference line. The upper girdle facets 8... 8 are formed in 16 surfaces in total. As a result, 33 cuts are formed for the entire crown.

The pavilion 4 has 44 cuts in its entirety, and has an inverted triangular shape as shown in FIG. As shown in FIGS. 1 and 3, a reference line 13 is provided below the pavilion 4 in parallel with the table 5 provided on the crown 2 at a predetermined position. The cross-sectional shape of the reference line 13 is an octagon. The pavilion 4 is divided into an upper part 4a and a bottom part 4b on the basis of the reference line 13.

The upper portion 4 a of the pavilion 4 has 32 cuts. As shown in FIG. 3, the cut is provided along each side of the reference line 13 having an octagonal cross-section, with each side being partially provided, and a triangular shape having vertices radially in the outer direction of the girdle 3. Eight cuts of the lower main facets 11... 11 are formed. A line formed on the extension of each side of the table 5 provided at the top of the crown 2 between the adjacent lower main facets 11, 11 (hereinafter, referred to as “keel line 15”). A cut of lower girdle facets 9... 9 is formed on both sides with. The cuts of the lower girdle facets 9 ... 9 are formed in 16 faces in total. In the upper part 4a of the pavilion 4, a triangular star facet 10 having a bottom at the top of the pavilion 4 and a vertex at a predetermined position of the keel line 15 is formed in the direction of the bottom of the pavilion. You. The star facets 10... 10 have a total of eight cuts.

On the other hand, the bottom 4 b of the pavilion 4 has 12 cuts. In this cut, a cross-shaped cut surface 12 is provided so as to have a vertex at the position of the reference line 13 in four directions from the center of the bottom. A cut surface is also formed on the remaining surface at the bottom.

The girdle 3 is defined by the intersection of the outer diameter line of the girdle 3 and the keel line 15. The divided surface is formed by equally dividing the divided surface into three. Around the girdle, 24 cuts are formed.

The feature of the diamond proportion in the present embodiment is that the number of cuts between the girdle 3 of the diamond body and the pavilion 4 is increased to reflect the light reflected on the table surface 5 of the light source incident on the diamond body. Can be maximized. Further, the cross-shaped cut surface 12 is provided on the bottom 4b of the pavilion 4, so that the fluorescent light source is incident on the diamond main body, so that the cross-shaped cut surface 12 emerges from the table surface 5 of the crown 2. I can see

Next, the design of the cut of the 101-plane cut diamond will be described in detail. The 101-plane cut diamond includes the crown 2, the guardle 3, and the pavilion 4, as described above. The design of each cut will be described.

The design of the cut in the crown 2 first draws a circle that determines the size of the diamond as viewed from a plane, and equally divides the circle into eight. First, draw the first reference line that passes through the center of the drawn circle. Next, a second reference line passing through the center of the circle and orthogonal to the first reference line is drawn. Further, a bisector of a first reference line and a second reference line which pass through the center of the circle and are orthogonal to each other is drawn.

Next, a first arc line for setting the diameter of the table surface 5 to be a predetermined ratio of the diameter of the girdle is drawn. An octagonal table surface 5 is established by connecting adjacent intersections of the first and second reference lines and the first arc line with a straight line.

Next, an auxiliary line for bisecting the angle between adjacent lines is drawn. In addition, a second arc line is drawn at an intermediate position between the first arc line and the outer shape of the circle. A triangular star facet 6... 6 is established by connecting a straight line between the intersection of the auxiliary line and the second arc line and both ends of each side of the table surface 5.

Furthermore, the intersection between the auxiliary line and the second arc line, and the intersection between the auxiliary line, the reference line drawn on both sides of the auxiliary line, and the outer shape of the girdle 3 are connected by a straight line to form an upper line. Main facets 7 ... 7 and upper girdle facets 8 ... 8 are established.

In the design of the cut in the girdle 3, a cut of 24 faces is established as a whole by dividing an adjacent first or second reference line into two bisectors.

In designing the cut in the pavilion 4, first, the reference line and the auxiliary line drawn by the crown 2 are extended and drawn toward the center of the pavilion 4. Further, in order to set the size of the cross-shaped cut surface 12 provided at the bottom of the pavilion 4, a third arc line having a size in which the cross-shaped cut surface 12 is inscribed is drawn. (The diameter of the third arc line is set to be equal to or smaller than that of the table surface 5.) By connecting the auxiliary line and the third arc line with the intersection point adjacent thereto with a straight line, An octagon is established.

The lower main facets 11... 11 are established by forming an isosceles triangle having a vertex in the girdle direction with one side of the octagon as the base. The lower girdle facets 9... 9 are established by drawing a line so as to bisect the area between the adjacent lower main facets 11, 11 (keel line 15). Also, between adjacent lower main facets 11, 11, a star facet 10 is formed by forming a triangle having a bottom at the top of the pavilion 4 and a vertex on a keel line 15 in the bottom direction. Is established. In the octagon, a cross-shaped cut surface 12 is established by forming a cross-shaped figure having vertexes in four directions from the center of the octagon in the girdle direction.

[0031]

[Effect of the invention]

 By increasing the number of cuts, the reflection efficiency on the table surface can be maximized. Further, since a cross-shaped cut surface formed at the bottom of the pavilion can be seen from the table surface, an effect of giving a sense of quality is brought about.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a 101-hedron cut proportion according to the present invention.

FIG. 2 is a plan view of a crown in a 101-hedron cut proportion.

FIG. 3 is a bottom view of a pavilion in a 101-plane cut proportion.

[Explanation of symbols]

 1 Girdle 2 Crown 2a Table 2b Star facet 2c Upper main facet 2d Upper girdle facet 3 Pavilion 3a Star facet 3b Lower girdle facet 3c Lower main facet 3d Keelline

Claims (5)

[Utility model registration claims] 1. A diamond having a girdle, a crown having a table surface provided at an upper portion of the girdle, and a pavilion formed at a lower portion of the girdle, wherein a cut surface is provided at a bottom portion of the pavilion. A proportion of 101-faced cut diamond, wherein the cut surface is formed so as to be visible from the table surface. 2. The proportion of a 101-plane cut diamond according to claim 1, wherein the cut surface appears to be raised from the table surface by irradiating a fluorescent color light. 3. The proportion of a 101-hedron cut diamond according to claim 1, wherein the shape of the cut surface is a cross shape. 4. The proportion of a 101-hedron cut diamond according to claim 1, wherein a cut surface is formed on the girdle. 5. A cut of 33 faces is established in the crown, a cut of 24 faces is established in the girdle, and a cut of 44 faces is established in the pavilion.
The 101-faced diamond cut proportion according to claim 1, wherein a cut of one face is established and formed.