JP3149720U - jewelry - Google Patents

Abstract

The contour viewed from above is cut into a regular pentagon or substantially a regular pentagon so that a light dispersion different from that of a crystal structure can be obtained, while an optical effect with original brightness and brightness is obtained. Provide new gems that can. Gemstones, in particular diamonds, have a girdle with a regular pentagonal or substantially regular pentagonal profile and five vertices 13 and five ridges 14. The geometric central axis preferably corresponds to one of the ternary symmetric crystal axes of the gem crystal structure. The crown 10 and the pavilion are separated from each other by a girdle, and have facets 21 to 24 that are 5 or multiples of 5 in a point symmetry divided into five around the geometric center axis of the crown 10 and the pavilion. The gemstone cut in this way can obtain a light dispersion different from that of the crystal structure, and can obtain an optical effect with original brightness and brightness. [Selection] Figure 1

Description

  The present invention relates to a jewel, and more particularly to a jewel whose outline viewed from above is cut into a pentagram. In the present specification, “gems” include not only natural gems such as diamond but also synthetic gems such as corundum and cubic zirconia, and quasi-gems such as artificial gems.

  The number five has a great meaning in nature, including the structure of the human body and the number of fingers on the limbs. In addition, the number 5 has a great meaning in geographical terms, such as the five continents and the five oceans. Furthermore, in China, there are so-called five-line theories such as wood, fire, earth, gold, and water, and the number five is considered special.

  The regular pentagon has been considered as a mysterious form since ancient times. If you go back to the original point while connecting one vertex of the regular pentagon, you will get a star shape. This star shape is called a pentagram (Solomon's star). A pentagram is a star-shaped regular polygon that consists of five line segments of equal length that intersect each other. There is a new regular pentagon in the five-pointed star. The line segment formed by intersecting each line with the other line, the original line segment, and the side length of the first regular pentagon all have a golden division ratio relationship. The shape obtained by removing the small regular pentagon inside the pentagram is sometimes called a five-star.

  On the other hand, gems have long been rough, cut into cabochons, or into various often irregular shapes, with the only concern being to give the gem the maximum volume possible. Now that cutting technology has developed greatly, cutting is scientifically accomplished by adhering to the laws of crystal optics to obtain the best yield of optical performance for transparent gemstones.

  In particular, diamond has high refractive index scattering as a function of light wavelength. Strong scattering is the source of shine that diamonds exhibit. Sparkle exists only when the light is broken apart by refraction and reflection on the polished facets of the cut diamond. Thus, brilliant cuts were developed and improved further. However, rough diamonds rarely have an ideal crystal shape, and many of them are distorted or deformed due to uneven development of crystal planes. If you sort out the shape of many diamond crystals, you can see that most of them are made up of a combination of three basic crystals. The most common are octahedral crystals (octahedron), followed by dodecahedron crystals (dodecahedron), and relatively few are hexahedral crystals (cubic).

  Conventional brilliant cuts have geometric symmetry axes that run in all directions by placing the facets to be cut generally parallel to the generatrix of the cone containing them, which are numbers 4 or multiples of 4; For example, 8 stars, 16 crown triangles and 16 pavilion triangles. The diamond cut in this way gives an image having a fourfold symmetry to the viewer (see, for example, Patent Document 1).

  Further, gems cut into various shapes such as round, oval, square, rectangle, pair, heart, pentagon, etc. other than brilliant cut are known (for example, see Non-Patent Document 1).

JP 2001-204520 A

GIA Diamond Encyclopedia, GIA JAPAN, issued April 11, 1969

  Diamonds cut by conventional brilliant cuts have only a fixed shape that gives the viewer an image that has four times the symmetry, and in rare cases they were cut in other shapes. However, there is a problem in that it is not very interesting and inferior in rarity.

  The object of the present invention is to obtain a light dispersion different from the crystal structure by cutting the outline seen from above into a regular pentagon or substantially a regular pentagon, while providing an optical with an original brightness and brightness. It is to provide a new gem that can be effective.

  A jewel according to claim 1 of the present invention has a facet of 5 or a multiple of 5 cut into a crown and a facet of a multiple of 5 or 5 cut into a pavilion around the geometric central axis. The facet of the crown and the facet of the pavilion are arranged symmetrically about the geometric center axis in five points, and the girdle separating the crown and the pavilion has five vertices and five It has a regular pentagonal or substantially regular pentagonal outline composed of a ridge line.

  A jewel according to claim 2 is the jewel according to claim 1, characterized in that it is composed of diamond or a stone having a refractive index and a scattering coefficient substantially equal to the refractive index and scattering coefficient of diamond.

  A jewel according to claim 3 is the jewel according to claim 1 or 2, characterized in that the geometric central axis corresponds to one of the ternary symmetric crystal axes of the crystal structure of the jewel.

  The jewel according to claim 4 is the jewel according to any one of claims 1 to 3, wherein the crown has a table having a regular pentagonal or substantially regular pentagonal outline, and five tables sharing an edge with the table. First facets, ten second facets interposed between the five first facets, and ten third facets sharing an edge with the second facet And ten fourth facets that share edges with the second facet and the third facet.

  The jewel according to claim 5 is the jewel according to any one of claims 1 to 4, wherein the pavilion has five fifth facets sharing an edge with the girdle, and a fifth facet. Ten sixth facets that share an edge, five seventh facets interposed between two adjacent sixth facets, a sixth facet, and a seventh facet It has ten eighth facets that share a face and an edge, and seven ninth facets and five ninth facets that share an edge with the eighth facet. .

  A jewel according to claim 6 is the jewel according to any one of claims 1 to 5, wherein the length of the diagonal line of the regular pentagon or substantially regular pentagon forming the outline of the girdle is 100%. The length of the regular pentagon or the diagonal of the regular pentagon is 53 to 58%, the height of the crown is 15 to 20%, and the depth of the pavilion is 40 to 55%. It is characterized by being.

  A jewel according to claim 7 is the jewel according to any one of claims 1 to 6, wherein a crown angle that is an angle between the girdle plane and the third facet is formed between 34 ° and 38 °, The pavilion angle β, which is the angle between the plane and the ninth facet, is formed between 38 ° and 42 °, and the curette angle, which is the angle between the ninth facet and the ninth facet across the curette. γ is formed between 105 ° and 109 °.

  The gemstone of the present invention gives a regular pentagonal or substantially regular pentagonal image and the effect of light reflection and different shades like a star emitting five rays, for those who see the regular pentagonal or substantially regular pentagon. Has an iridescent optical effect.

The top view of the jewelry concerning Example 1 of the present invention. FIG. 3 is a top transparent view of a gem according to the first embodiment. FIG. 2 is a bottom view of a jewel according to the first embodiment. The side view seen centering on the ridgeline of the girdle of the jewelry which concerns on the present Example 1. FIG. The side view seen centering on the vertex of the girdle of the jewelry which concerns on the present Example 1. FIG. Sectional drawing of the jewelry which concerns on the present Example 1. FIG.

  The gemstone of the present invention is composed of diamond or stone having a refractive index and a scattering coefficient substantially equal to those of diamond. The geometric shape of the gem cut has a geometric center axis of rotation of a regular pentagon or substantially a regular pentagon. The facets of the cut are thus arranged in a five-point point symmetry around the geometric central axis in a regular pentagonal or substantially regular pentagonal arrangement. Preferably, the geometrically symmetrical central axis (geometric central axis) corresponds to one of the ternary symmetrical crystal axes of the gem crystal structure. With these characteristics, it is possible to obtain a light dispersion different from that of the crystal structure of a gemstone, while obtaining an optical effect having an original brightness and brightness.

  Hereinafter, jewelry according to Example 1 of the present invention will be described with reference to the drawings.

  In the following description, a case where the gem is diamond will be described as an example.

  1 to 6 are a top view, a top transparent view, a bottom view, a side view centered on the ridge line of the girdle 20, and a top view of the girdle 20 as a center. They are a side view and a sectional view. This diamond has a crown 10 and a pavilion 30 separated by a girdle 20. This diamond cut geometry has a regular pentagonal or substantially regular pentagonal rotational geometric central axis 11 (see FIG. 4). The facets of the cut are thus arranged in a five-point point symmetry around the geometric central axis 11 in a regular pentagonal or substantially regular pentagonal arrangement.

  The geometrical central axis 11 preferably coincides with one of the ternary symmetric crystal axes of the diamond crystal structure, if the geometry of the rough diamond to be cut allows. The plane of the table 12 and the girdle 20 (the girdle plane) is parallel to one of the facets of the octahedral crystal of the rough diamond, which allows the table 12 to be positioned by cutting the rough diamond. When the table 12 is perpendicular to one of the ternary symmetric crystal axes of the diamond crystal structure, sawing as is generally necessary can be avoided.

  The crown 10 has a regular pentagonal or substantially regular pentagonal table 12 depending on the accuracy of the cut. From the table 12, a ninth facet 35 or the like cut into a pavilion 30 to be described later can be seen through like a petal of a five-valve.

  The crown 10 is interposed between a table 12 having a regular pentagonal or substantially regular pentagonal outline, five triangular first facets 21 sharing an edge with the table 12, and the first facet 21. Ten parallelogram-shaped second facets 22, ten parallelogram-shaped third facets 23 sharing an edge with the second facet 22, a second facet 22, and The third facet 23 has ten triangular fourth facets 24 sharing an edge. The ten fourth facets 24 are connected to the girdle 20.

  The outline of the girdle 20 is a regular pentagon or substantially having five vertices 13 and five ridges 14 when viewed perpendicular to the geometric central axis 11, as shown in FIGS. It has a regular pentagonal shape.

  The pavilion 30 includes five triangular facets 31 that share edges with the girdle 20, and ten triangular facets 32 that share edges with the fifth face 31. Five parallelogram-shaped seventh facets 33 interposed between the sixth facets 32 and ten triangular faces sharing edges with the sixth facet 32 and the seventh facet 33 It has an eighth facet 34 and five parallelogram-like ninth facets 35 interposed between the eighth facet 34. The five ninth facets 35 are connected to the curette 36.

  As shown in FIG. 5, assuming that the length of a regular pentagon or substantially regular pentagon diagonal forming the outline of the girdle 20 is 100%, the length of the regular pentagon or substantially regular pentagon diagonal of the table 12 is preferably 53 to 58%. The height of the crown 10 is preferably 15 to 20%. Further, the depth of the pavilion 30 is preferably 40 to 55%. In addition, although the height of the girdle 20 is arbitrary, it is formed to a relatively small value.

  As shown in FIG. 6, the crown angle α, that is, the angle between the girdle plane and the third facet 23 is preferably formed between 34 ° and 38 °. The pavilion angle β, that is, the angle between the girdle plane and the ninth facet surface 35 is preferably formed between 38 ° and 42 °. The curette angle γ, that is, the angle between the ninth facet 35 and the ninth facet 35 sandwiching the curette 36 is preferably between 105 ° and 109 °.

  The diamond that is the gem according to the first embodiment configured as described above is cut in the following process, for example.

  First, rough stone inspection and marking are performed. In detail, the shape of naturally produced rough is rarely regular, and in many cases, it has many incomplete shapes and defects. Therefore, in processing, first of all, carefully examine and select the shape, crystal form, twins, impurities, cracks, etc. of the rough, and then classify the grade, and determine the use and effective processing method .

  Next, cleavage with a cleaver is performed. Specifically, a single rough is divided into two or more to remove impurities and irregular parts of the rough diamond. Cleaving is used because it is not efficient in grinding work to divide the rough into several parts or remove defects. An irregularly shaped rough diamond always has a face corresponding to one of hexahedron, octahedron, and dodecahedron. Since the cleavage of diamond is perfect, its possible direction is parallel to a plane perpendicular to the geometrical central axis 11 of the diamond. Preferably, the table 12 is obtained by cleavage parallel to one face of the octahedral crystal of diamond.

  Subsequently, if necessary, sawing is performed by a sawer. Specifically, it is usually used when one rough diamond is divided into two at the center. The direction of the crystal that can be cut is limited.

  Next, different facets of the crown 10 and the pavilion 30 are cut. This cut is preferably made with the aid of a laser cutting device. The cut surface of the girdle 20 is then polished and cleaned until all traces of black carbonization due to laser burning disappear.

  Subsequently, polishing with a polisher is performed. Specifically, the diamond is finally polished on a grinding wheel. 31 surfaces of the crown 10 and 35 surfaces of the pavilion 30 are polished by brilliant. Similarly, a regular pentagonal or substantially regular pentagonal profile of the girdle 20 is cut with five vertices 13 and five ridges 14.

  The cut diamond makes it possible to obtain a total internal reflection having a regular pentagonal or substantially regular pentagonal shape, which gives the diamond a new original optical effect. That is, the regular pentagon or substantially regular pentagon is the total internal reflection on the fifth to ninth facets 31 to 35 of the pavilion 30 and the unique reflection on the first to fourth facets 21 to 24 of the crown 10. In combination with it, it is possible to obtain a remarkable and original radiance and brightness due to its regular pentagonal or substantially regular pentagonal distribution.

  As described above, the first embodiment according to the present invention has been described. However, this is merely an example, and the present invention is not limited to this example. Those skilled in the art can use the invention without departing from the scope of the utility model registration request. Various modifications based on this knowledge are possible. In particular, gem cutting according to the present invention can be performed on other stones and gems having a refractive index and scattering coefficient similar to or substantially equal to the refractive index and scattering coefficient of diamond. It is desirable to change the angle of inclination of the facet considering the refractive index of the alternative stone. Therefore, the facet angle can be changed according to the shape of the rough. Other supplemental facets can also be added.

  The present invention can be widely used not only for natural gems such as diamond, but also for synthetic gems such as corundum and cubic zirconia, and semi-gems such as artificial gems.

DESCRIPTION OF SYMBOLS 10 Crown 11 Geometric center axis | shaft 12 Table 20 Girdle 21 1st facet 22 2nd facet 23 3rd facet 24 4th facet 30 Pavilion 31 5th facet 32 6th facet 33 7th facet 34 8th facet 35 9th facet 36 Curette

Claims (7)

  5 or multiple 5 facets cut into a crown and 5 or 5 multiple facets cut into a pavilion around a geometric central axis, the facets of the crown and the pavilion A facet is substantially or a regular pentagon in which a facet is arranged in a five-point point symmetry around the geometric central axis, and a girdle separating the crown and the pavilion is composed of five vertices and five ridges. Jewel characterized by having an outline.   The jewel according to claim 1, comprising diamond or a stone having a refractive index and a scattering coefficient substantially equal to a refractive index and a scattering coefficient of diamond.   The gemstone according to claim 1 or 2, wherein the geometric central axis corresponds to one of the ternary symmetric crystal axes of the crystal structure of the gemstone.   The crown is interposed between a table having a regular pentagonal or substantially regular pentagonal profile, five first facets sharing an edge with the table, and five first facets 10. Ten second facets, ten third facets sharing an edge with the second facet, and ten pieces sharing an edge with the second facet and the third facet The jewel according to any one of claims 1 to 3, further comprising a fourth facet.   The pavilion has five fifth facets that share edges with the girdle, ten sixth facets that share edges with the fifth facets, and two adjacent sixth faces. Five seventh facets interposed between the facets of the first, tenth facets sharing the edges with the sixth facet and the seventh facet, and the seventh facet 5. The gemstone according to claim 1, further comprising five ninth facets sharing an edge with the eighth facet.   When the length of the diagonal of the regular pentagon or substantially regular pentagon forming the outline of the girdle is 100%, the length of the diagonal of the regular pentagon or substantially regular pentagon of the table is 53 to 58%, The jewel according to any one of claims 1 to 5, wherein the crown has a height of 15 to 20%, and the pavilion has a depth of 40 to 55%.   A crown angle that is an angle between the girdle plane and the third facet is formed between 34 ° and 38 °, and a pavilion angle β that is an angle between the girdle plane and the ninth facet is from 38 ° to 42 °. The cullet angle γ, which is an angle between the ninth facet and the ninth facet sandwiching the curette, is formed between 105 ° and 109 °. Or the jewelry according to any one of 6 to 6.

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