JP2651522B2 - Diamond jewelry - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to diamond jewelry (rings, earrings, necklaces, bracelets, bracelets, brooches, ornaments, etc.) using brilliant-cut diamonds.

[0002]

2. Description of the Related Art Diamonds, which are poor in color, are superior to other jewels in terms of beauty. They are vividly reflected light called prillian, and fire that disperses light like a prism. It is attributed to three types of light: an iris called, and a flash called scintillation. In addition, among the various diamond cutting methods, the Brillian cut is the best for efficiently extracting three types of light, and most of them are Brillian cut.

FIG. 1 schematically shows proportions of a brilliant cut, in which an upper portion 1 is a “crown”, a lower portion 2 is a “pavilion”, and a peripheral edge 3 therebetween is a “girdle”.
The flat top 4 of the crown 1 is the “table” and the crown 1
Is referred to as a “bezel” and the tip 6 of the pavilion 2 is referred to as a “curette”. The bezel 5 has eight diamonds continuous below the eight triangles, the girdle 3 is surrounded by 16 small triangles, and the pavilion 2 consists of 16 inverted triangular faces, two of which face each other. Are parallel. In this form, both the incident light A from the table 4 of the crown 1 and the incident light B from the bezel 5 are internally reflected (total reflection) by the pavilion 2, and the incident light A becomes reflected light a from the table 4. The incident light B is emitted from the table 4 as reflected light b and emitted. The refraction angle of the incident light A with respect to the perpendicular of the incident point and the incident angle of the incident light with respect to the perpendicular of the emission point are φ ₁ °, respectively. φ ₂ °, similarly, those of the incident light B are ρ ₁ ° and ρ ₂ °, respectively, the angle of the bezel 5 with respect to the girdle 3 is α °, and the pavilion 2 with respect to the girdle 3
Is β °, the following relational expression (Brilliant law) holds.

[0004] The incident light A, for _{φ 1 ° + φ 2 ° =} 4β ° -180 ° ······ (1) incident light _{B, ρ 1 ° + ρ 2} ° = 4β ° + α ° -180 ° ... (2) The positive and 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 opposite to that of FIG. Side, for example φ
₁ is right, if the phi ₂ is on the left side, the other is negative one is positive.

[0005] From this relational expression, an ideal brilliant cut has a girdle 3 with a diameter of 1 as shown in FIG.
Assuming 00%, the diameter of the table 4 is 53%, the height of the crown 1 is 16.2%, and the height of the pavilion 2 is 43.1.
%, And the angle of the bezel 5 is 34 ° 30 ',
It is assumed that the angle of the pavilion 2 is 40 ° 45 ′ and the vertex angle of the curette 6 is 98 ° 30 ′, which is called “ideal proportion”.

[0006] On the other hand, regarding the color of diamond, colorless and transparent is considered to be the highest value because the color of the iris has the highest expression of colorless and transparent. However, there are very few natural diamonds that are colorless and transparent. Most of them contain yellow, and the color grade becomes lower as the yellowness becomes deeper, with the highest being completely colorless. Also, so-called blue diamonds having a blue color are prized because they are rare even if they have a color.

[0007]

Heretofore, diamonds having a low color grade have been colored to a color other than yellow in order to eliminate the yellowish appearance of the diamond, and other colors such as green-blue and brown have been used in order to provide a uniqueness. As a diamond coloring method for coloring a material, a method of vacuum-depositing a fluoride or a method of irradiating an electron beam with a cyclotron (nuclear destruction device) to physically color the material has been attempted. However, all of them require a large-scale apparatus, so that they are expensive, and they are permanently colored. Therefore, it was not possible to arbitrarily change to a desired color.

[0008] Even if it is easy to color the diamond, if the three types of light, especially the iris called fire, are reduced, the original value of the diamond as a high-grade jewel is lost.

Accordingly, an object of the present invention is to provide a diamond jewelry based on the above-mentioned optical properties of brilliant-cut diamond and the problems of the conventional diamond coloring method. Also, in view of the fact that there is a tendency for demand for so-called `` fancy color diamonds '' to be insufficient with colorless and transparent diamonds, the appearance color of the brilliant-cut diamonds is greatly reduced without impairing the vividness of the original iris. An object of the present invention is to provide a diamond jewelry which can be arbitrarily colored by simple means and can be easily changed in color.

[0010]

SUMMARY OF THE INVENTION The present invention relates to a diamond jewelry in which at least a crown of brilliant-cut diamond is exposed and a pavilion is held on a support base, a conical surface around the pavilion including the culet is colored. A colored portion is formed by the agent.

[0011] The coloring agent is used because it has good adhesion to the diamond surface, good light reflectivity, does not easily fall off with water or sweat, and is easy to wipe off and remove after the fact. Oil-based inks are preferred. The coloring range for the conical surface is preferably 10% to 15% of the height of the pavilion. It is preferable to expose the colored portion on the back side of the hole provided in the support so that the colored portion can be easily repainted.

[0012]

According to the present invention, a colored portion is formed by a coloring agent limited to the surface around the curette at the tip of the pavilion of the brilliant cut diamond. The culet is located at the center of the internal reflection surface, and if it has an accurate brilliant cut, as shown in FIG. 3, the amount of the internally reflected light that has entered the crown and reflected the culet and the conical surface around it as shown in FIG. The portion is evenly emitted from the table, and the emitted light has the color of the colored portion applied to 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 is a colored portion by a coloring agent in FIG. 1), all the outgoing rays shown in FIG. The color of the colored part is slightly reduced in color, but the iris maintains the same brightness as when it is not colored, and is applied to the conical surface. The shape of the colored portion is not visible at all.

On the other hand, if the angle of the pavilion 2 is too large, the incident light is internally reflected by the pavilion 2, but escapes from the surface opposite to the reflection surface, resulting in an iris called fire. Does not occur. Conversely, if the angle of the pavilion 2 is too small, the incident light will be transmitted as it is.

That is, if the angle of the pavilion is too large, the light rays converge at the center of the table as shown in FIG. 4, and the colored portions appear as solid colored marks. This colored mark is distorted or partially missing if the 16 inverted triangular faces of the pavilion are uneven or the opposing faces are not parallel.

On the other hand, if 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 periphery thereof increases, so that the colored portion appears as a ring-shaped colored mark. This ring-shaped colored mark is also distorted or partially missing if the surfaces of the 16 inverted triangles of the pavilion are uneven or the opposing surfaces are not parallel.

Accordingly, if the diamond is accurately brilliant cut, the colored portion is not seen at all from the crown surface, but is colored evenly as a whole and exhibits almost the same iris as when not colored. Visualized as Also, the color appearance seen through the table reflects the proportions of the brilliant cut, and not only the quality of the proportions but also the type of the defect, so the jewelry using brilliant cut diamonds accurately In such cases, the appearance of a colored diamond as described above guarantees good proportions.

[0017]

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

As shown in FIG. 6, oily ink is applied to the entire circumference of the curette 6 and its conical surface (the surface of the pavilion 2) as shown in FIG. 6 for each brilliant-cut diamond having a different proportion (finished size). The colored portion 7 was observed through the table 4 while changing the range of the colored portion 7 (the height from the curette 6).

The coloring range is 15 of the height of the pavilion 2.
%, The proportions of all proportions seemed to be non-shining glass balls of all colors due to the color of the colored portion 7, and the proportions could not be distinguished. On the other hand, if the proportion is less than 5%, the color of the colored portion 7 is not reflected in any proportion,
In this case, too, the difference in proportion could not be distinguished. When the content is 5% to 10%, the color of the colored portion 7 is slightly reflected, but it is insufficient to discriminate the difference in proportion.

Between 10% and 15%, differences in proportions could be clearly identified. That is, in the case of a proportion (ideal proportion) in which the brilliant cut is correctly performed, the colored portion 7 has a slightly lighter color but has an iris that maintains the same brightness as that when the colored portion 7 is not colored. No contour shape was visible. However, when the proportion β of the pavilion 2 was too large, the colored portion 7 appeared as a solid colored mark. Conversely, Pavilion 2
Is too small, the colored portion 7 appears as a ring-shaped colored mark.

When the ink is colored with a water-based ink instead of the oil-based ink, the water-based ink has poor adhesion to the diamond surface and poor light reflectivity as compared with the oil-based ink. Was not obtained. Further, a pre-colored sheet was adhered to the conical surface, and the same was true in this case.

Based on such an experiment, the present invention was applied to a ring as shown in FIG. In this ring, a mounting hole 9 is provided in a noble metal ring 8 which is a support base, and a pavilion 2 of a brilliant cut colorless or slightly yellowish diamond 10 is fitted into a frustoconical front side portion 9a of the mounting hole 9. Thus, the diamond 10 is held on the ring 8. The crown 1 of the diamond 10 protrudes from the outer periphery of the ring 8, and the lower part of the pavilion 2 is located in an inverted truncated conical back portion 9 b of the mounting hole 9. Then, in the back side portion 9b of the mounting hole 9, an oil-based ink is applied to the conical surface including the curette 6 of the pavilion 2 of the diamond 10 in the range of 10% to 15% of the height of the pavilion. A colored portion 7 was formed. When a colored portion 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 formed.
However, looking at the crown, it looked like a blue diamond.

Therefore, when this ring is actually put on a finger,
In the diamond 10, only the crown 1 is exposed,
Is completely invisible, so it looks like you are wearing a rare blue diamond ring. The oil-based ink does not easily fall off with water or sweat, but can be easily wiped off with a normal cleaning agent such as thinner.
By repainting with another color of oil-based ink, the same diamond 10 having no color or slightly yellow can be freely transformed into a color diamond of any color. The discoloration can be easily performed by the user, so changing the color can change the mood.
It can economically respond to the taste of diamond. In addition, if the diamond is proportionately cut with accurate brilliant cut, as described above, there will be no abnormal color parts and the iris will be brightly colored, so for the seller,
This is a selling point that the proportion is guaranteed to be good.

In the illustrated example, a ring in which the diamond 10 is directly held on the ring 9 has been described.
The ring 9 is provided with a plurality of standing claws, and the ring is not limited to the ring holding the diamond on the ring by the standing claws.
Of course, it can be applied to other diamond jewelry such as earrings, necklaces, bangles, bracelets, brooches, and figurines.

[0025]

According to the present invention, in a diamond jewelry in which at least a crown of brilliant-cut diamond is exposed and a pavilion is held on a support, a conical surface around the pawl including a culet is colored with a coloring agent. A very simple means of forming, without impairing the brilliant cut diamond's original iris vividness, the appearance color can be very easily and arbitrarily colored, and the color change can be made very easily Can be. Further, the colored portion can be hidden during use, so that the jewelry value is not lost.

Therefore, the user can change his / her mood by changing the color, and the latest fancy color
It can respond economically to the taste of diamond. Also, if the proportion of diamonds is accurately brilliant-cut, there will be no abnormal colors and the iris will be vividly colored, so that the seller is assured that the proportions are good. It also becomes a selling point.

When an oil-based ink is used as a coloring agent, it has good adhesion to the diamond surface, good light reflectivity, does not easily fall off with water or sweat, and is easily wiped off after the fact. It is advantageous in the point.

By setting the coloring range of the conical surface to 10% to 15% of the height of the pavilion, the same colorless or slightly yellowish diamond can be formed in any color without causing an abnormal color portion. Can be transformed into colored diamonds.

If the colored portion is exposed on the back side of the hole provided in the support, the repainting and wiping of the colored portion can be easily performed.

[Brief description of the 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 a crown surface in a case where the angle of the pavilion is too large.

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

FIG. 6 is a front view showing a brilliant cut diamond on which a colored portion is formed.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crown 2 Pavilion 3 Girdle 4 Table 5 Bezel 6 Curette 7 Coloring part 8 Ring (support stand) 9 Mounting hole 10 Diamond

Claims (4)

(57) [Claims] 1. A diamond jewelry in which at least a crown of a brilliant-cut diamond is exposed and a pavilion is held on a support base, a colored portion made of a coloring agent is formed on a peripheral conical surface including a culet of the pavilion. Diamond jewelry characterized by the following. 2. The diamond jewelry according to claim 1, wherein the colorant is an oil-based ink. 3. The coloring range of the colored portion is one of the height of the pavilion.
The diamond jewelry according to claim 1, which is 0% to 15%. 4. The method according to claim 1, wherein the colored portion of the diamond is exposed on the back side of the hole provided in the support.
The diamond jewelry according to any one of claims 2 and 3.