JP3008486U - Diamond jewelry - Google Patents

Abstract

(57) [Abstract] [Purpose] A diamond jewelery that allows the appearance color to be arbitrarily colored with a very simple means without sacrificing the vividness of the original iris of the diamond, and which is extremely easy to change. provide. [Structure] In a diamond jewelery in which a diamond 10 whose lower portion is cut into a pyramid shape is held on a support 8, a colored portion 7 made of a colorant is formed around the tip portion 6 of the lower portion of the pyramid shape of the diamond. Oil-based ink is a good colorant.
The colored portion 7 is exposed on the back side of the hole 9 provided in the support base.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a diamond jewelry (ring, earring, necklace, bracelet, brooch, figurine, etc.) using diamond.

[0002]

[Prior art]

 Diamond, which lacks in color, is superior to other gemstones in terms of beauty. It has a vibrant reflected light called Priliancy, an iris called Fire that scatters light like a prism, and scintillation. It is said that it is caused by three kinds of light called flash light. Also, among the many diamond cutting methods, the brilliant cut is the best for extracting three types of light efficiently, and most of them are brilliant cut.

FIG. 1 shows the proportions of the brilliant cut in a simplified manner: the upper part 1 is a “crown”, the lower part 2 is a “pavilion”, the peripheral edge 3 between them is a “girdle”, and the flat top surface of the crown 1 is shown. 4 is called "table", the slope 5 of the crown 1 is called "bezel", and the tip 6 of the pavilion 2 is called "curette". The bezel 5 is composed of 8 triangles under 8 triangles, the girdle 3 is surrounded by 16 small triangles, and the pavilion 2 is composed of 16 inverted triangular faces. The two are parallel to each other. In this shape, the incident light A from the table 4 of the crown 1 and the incident light B from the bezel 5 are both internally reflected (totally reflected) by the pavilion 2, and the incident light A is reflected from the table 4 as reflected light a. Since the incident light B is also emitted as reflected light b from the table 4, the angle of refraction of the incident light A with respect to the perpendicular of the incident point and the incident angle with respect to the perpendicular of the incident point are respectively φ ₁ ° and φ ₂ °, similarly ρ ₁ ° and ρ ₂ ° of the incident light B, respectively, the angle of the bezel 5 with respect to the girdle 3 is α °, and the angle of the pavilion 2 with respect to the girdle 3 is β °. The relational expression (Brilliant law) holds.

For incident light A, φ ₁ ° + φ ₂ ° = 4β ° −180 ° (1) For incident light B, ρ ₁ ° + ρ ₂ ° = 4β ° + α ° −180 ° (2) The positive / negative relationship between the refraction angles φ ₁ and ρ ₁ with respect to the perpendicular of the incident point and the incident angles φ ₂ and ρ ₂ with respect to the perpendicular of the exit point is different from that of FIG. 1 with respect to the perpendicular. If on the opposite side, for example φ ₁ is on the right and φ ₂ is on the left, one is positive and the other is negative.

Based on this relational expression, the ideal brilliant cut has a diameter of the table 4 of 53% and a height of the crown 1 of 16.2 when the diameter of the girdle 3 is 100% as shown in FIG. %, The height of the pavilion 2 is 43.1%, the angle of the bezel 5 is 34 ° 30 ′, the angle of the pavilion 2 is 40 ° 45 ′, and the apex angle of the curette 6 is 98 ° 30 ′. It is said that this is called "ideal proportion".

On the other hand, regarding the color of diamond, colorless and transparent are the highest in value because the highest iris expression is colorless and transparent, but there are very few natural diamonds that are colorless and transparent. However, most of them contain yellow, and the color grade becomes lower as the yellowness becomes stronger, with perfect colorlessness being the highest. In addition, so-called blue diamonds, which have a blue tint, are rare because they are rare even if they have a color.

[0007]

[Problems to be solved by the device]

 Conventionally, as a diamond coloring method of coloring a diamond with a low color grade in a color other than yellow in order to eliminate the yellow tint from the appearance, or in another color tone such as greenish blue or brown in order to impart strangeness, Attempts have been made to vacuum-evaporate fluoride, or to irradiate an electron beam with a cyclotron (nuclear destruction device) to color the material physically. However, all of them are expensive because they require a large-scale device, and they are permanently colored, so it is impossible to arbitrarily change them to a desired color.

Even if it is easy to color diamond, if the above three types of light, especially the iris called fire, are diminished, the diamond's original value as a luxury gem is lost.

Therefore, an object of the present invention is to make diamond jewelery colorless even in consideration of the above-mentioned optical properties of diamond, and in view of the problems of the conventional diamond coloring method, and more recently due to the tendency to emphasize individuality. In light of the fact that the demand for “fancy color diamonds” is increasing, and the so-called “fancy color diamonds” tend to be more than enough for transparent diamonds, the appearance color of the diamonds can be made very simple without impairing the vividness of the original iris. The objective is to provide a diamond jewelery that can be colored as desired and is extremely easy to change.

[0010]

[Means for Solving the Problems]

 The present invention is a diamond jewelery in which a diamond having its lower portion cut into a pyramid shape is held on a support table, and a colored portion formed by a coloring agent is formed around the diamond cone-shaped lower portion including its tip.

The colorant has good adhesion to the diamond surface, good light reflectivity, does not easily fall off with water or sweat, and can be easily removed by wiping after the fact. Oily inks are preferred. It is advisable to expose the colored portion to the back side of the hole provided in the support so that the colored portion can be easily repainted.

[0012]

[Action]

 In the present invention, the colored portion is formed by the coloring agent, with the tip of the lower part of the pyramid of the diamond as the center, limited to the peripheral surface. In the case of a brilliant-cut diamond, its curette is located at the center of the internal reflection surface, and if it is an accurate brilliant-cut, it enters from the crown as shown in Fig. 3 and enters the curette and its surrounding cone. Most of the internally reflected light reflected by the shaped surface is evenly radiated from the table, and the emitted light rays have the color of the colored portion formed by coating on the conical surface. In this case, since the range of the colored portion is limited to a part of the surface of the pavilion (the hatched portion in FIG. 1 is the colored portion with the coloring agent), all of the outgoing rays shown in FIG. 3 are colored with the colored portion. It does not become a single color light ray, and the light ray due to coloring is mixed in it, and it becomes colored with the color of the colored part slightly diminished, but it presents an iris that maintains almost the same brightness as when it is not colored, The shape of the colored part applied to is not visible at all.

On the other hand, when the angle of the pavilion 2 is too large, the incident light is internally reflected by the pavilion 2, but escapes from the opposite surface facing the reflecting surface, and an iris called a fire. Does not occur. On the contrary, if the angle of the pavilion 2 is too small, the incident light is transmitted as it is.

That is, if the angle of the pavilion is too large, as shown in FIG. 4, the light rays converge on the central portion of the table, and the colored portion appears as a filled colored mark. The colored marks are distorted or partially chipped unless the 16 inverted triangular faces of the pavilion are uneven or the facing faces are not parallel.

On the other hand, when the angle of the pavilion is too small, as shown in FIG. 5, light rays from the central portion of the table escape and the surrounding area increases, so that the colored portion appears as a ring-shaped colored mark. This ring-shaped colored mark is also distorted or partially chipped unless the 16 inverted triangular faces of the pavilion are uneven or the facing faces are not parallel.

Therefore, if the diamond is accurately brilliant-cut, a colored diamond showing no iris as seen from the crown surface but having an even color over the whole and not coloring Be viewed as. In addition, the appearance of the color that can be seen through the table reflects the proportion of the brilliant cut, and not only the quality of the proportion but also the type of the defect can be known, so jewelry that uses accurately brilliant cut diamonds. In this case, the appearance looks like the colored diamonds above, which guarantees that the proportions are good.

[0017]

【Example】

 Next, an embodiment of the present invention will be described.

For each of the brilliant-cut diamonds with different proportions (finished size), an oil-based ink is applied to the entire circumference of the curette 6 and the peripheral pyramid surface (surface of the pavilion 2) as shown in FIG. Then, the range of the colored portion 7 (height from the curette 6) was variously changed and observed through the table 4.

When the coloring range exceeds 15% of the height of the pavilion 2, it looks like a glass ball without any shine due to the color of the coloring part 7 in any proportion, and it is possible to distinguish between the proportions. There wasn't. On the other hand, when the proportion was 5% or less, the color of the colored portion 7 was not reflected in any proportion, and in this case also, it was impossible to distinguish between the proportions. When it was 5% to 10%, the color of the colored portion 7 was slightly reflected, but it was insufficient to identify the difference in proportion.

When it was set between 10% and 15%, it was possible to clearly identify the difference in proportion. That is, in the case of a correctly brilliant cut proportion (ideal proportion), the color of the colored portion 7 is slightly dimmed, but the iris maintains a brilliance similar to that when it is not colored, and the colored portion 7 I couldn't see the outline shape. However, in the case of the proportion in which the angle β of the pavilion 2 was too large, the colored portion 7 appeared as a filled colored mark. On the contrary, when the proportion β of the pavilion 2 is too small, the colored portion 7 appears as a ring-shaped colored mark.

When the ink was colored with a water-based ink instead of the oil-based ink, the water-based ink originally had a poorer adhesion to the diamond surface as compared with the oil-based ink and also had a poor light reflection property. The result like the case was not obtained. Furthermore, a pre-colored sheet was attached to the conical surface, but the same was true in this case.

Based on such an experiment, the present invention was applied to a ring as shown in FIG. This ring is provided with a mounting hole 9 in a noble metal ring 8 as a support, and a frustoconical front side portion 9a of the mounting hole 9 is a pavilion of a brilliant-cut colorless or slightly yellowish diamond 10. The diamond 10 is held by the ring 8 by fitting 2 in it. The crown 1 of the diamond 10 projects from the outer periphery of the ring 8 and the lower part of the pavilion 2 is located in the reverse frustoconical backside part 9b of the mounting hole 9. Then, in the back side portion 9b of the mounting hole 9, oil-based ink is applied to the conical surface around the diamond 10 including the curette 6 of the pavilion 2 within a range of 10% to 15% of the height of the pavilion. To form the colored portion 7. When the colored part 7 was formed with a blue oil-based ink using a commercially available oil-based ink pen, a colorless or slightly yellowish diamond 10 was seen as if it were blue diamond when the crown 1 surface was seen.

Therefore, when the ring is actually fitted to a finger, only the crown 1 of the diamond 10 is exposed and the colored portion 7 is completely invisible, so that it feels like wearing a rare blue diamond ring. Become. The oil-based ink does not easily come off with water or sweat, but it can be easily wiped off with a normal cleaning agent such as thinner, so if it is repainted with another color of the oil-based ink, it becomes colorless or slightly yellowish. One same diamond 10 can be freely transformed into a colored diamond of any color. The color change can be easily done by the user, so you can change the mood by changing the color, and you can economically support the recent trend of fancy color diamonds. In addition, if the diamond has a proportion that is accurately brilliant-cut, there will be no abnormalities in the color and the iris will be vividly colored as described above, so it is guaranteed that the proportion will be good for the seller. It also serves as a selling point.

In the illustrated example, the ring in which the brilliant-cut diamond 10 is directly held on the ring 9 has been described, but the present invention is applicable to other cut shapes having a lower pyramid shape, for example, step cut, table cut, and marquise. It may be a cut diamond, or a ring with a plurality of standing claws provided on the ring 9 to hold diamonds on the ring with these standing claws, and not limited to rings, earrings, necklaces, bracelets, bracelets, brooches, figurines, etc. Of course, it can be applied to other diamond jewelery.

[0025]

[Effect of device]

 The present invention is a diamond jewelery in which a diamond is cut into a pyramid shape and is held on a support base. It is very simple to form a colored part with a coloring agent around the diamond cone including the tip. By the means, the appearance color can be very easily and arbitrarily colored without impairing the freshness of the original iris of the diamond, and the color can be changed very easily. In addition, since the colored portion can be hidden during use, the jewelery value is not impaired.

Therefore, the user can change his / her mood by changing the color, and can economically cope with the recent trend of the fancy color diamond. In addition, a diamond with a proportion that has been accurately brilliant-cut has no abnormalities in color and has a vivid color of the iris, so the seller is assured that the proportion is good. It also becomes a selling point.

When an oil-based ink is used as a colorant, it has good adhesion to the diamond surface, good light reflectivity, does not easily fall off with water, sweat, etc., and is easy to wipe off after the fact. Etc. are advantageous.

By exposing the colored portion to the back side of the hole provided in the support base, repainting and wiping of the colored portion can be easily performed.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a basic configuration of a brilliant-cut diamond.

FIG. 2 is a diagram showing ideal proportions of a brilliant cut diamond.

FIG. 3 is a diagram showing light rays emitted from a crown surface in the case of ideal proportions.

FIG. 4 is a diagram showing light rays emitted from the crown surface in the case of proportions in which the pavilion angle is too large.

FIG. 5 is a diagram showing a light beam emitted from a crown surface in the case of a proportion in which the pavilion angle is too small.

FIG. 6 is a front view showing a brilliant cut diamond having a colored portion formed thereon.

FIG. 7 is a partially cutaway front view of an embodiment of the present invention applied to a ring.

[Explanation of symbols]

 1 Crown 2 Pavilion 3 Girdle 4 Table 5 Bezel 6 Curette 7 Colored part 8 Ring (support base) 9 Mounting hole 10 Diamond

Claims (3)

[Scope of utility model registration request] 1. A diamond jewelery in which a diamond whose lower part is cut in a pyramid shape is held on a support, wherein a colored portion formed by a coloring agent is formed in the periphery including the tip of the lower part of the pyramid shape of the diamond. Jewelry goods. 2. The diamond jewelry according to claim 1, wherein the colorant is an oil-based ink. 3. The diamond jewelery according to claim 1, wherein the colored portion of the diamond is exposed on the back side of the hole provided in the support base.