JP6490930B2 - A decagonal diamond with a heart-and-arrow pattern - Google Patents

Description

  The present invention is a further continuation-in-part of US patent application Ser. No. 12/208806, filed Sep. 16, 2008, which is a continuation-in-part of 11/744571. It is to be used. And the present invention relates to the field of cut diamonds, and in particular to produce a heart and arrow pattern substantially comparable to the heart and arrow pattern resulting from an ideal round cut diamond when exposed to light. Related to diamonds with an adapted decagonal shape.

  When a round cut diamond has an almost perfect symmetrical shape, and has facets that are polished in a relatively narrow ratio and are equally symmetrically cut as shown in Table 1 below, when exposed to light In addition, the heart and arrow pattern is shown by the round cut diamond. Nearly perfect round-cut diamonds with a heart-and-arrow pattern give gloss, color and optical light handling properties to date that are not suitable by any other shape of diamond on the market. Diamonds are cut into many known geometric shapes, such as heart shapes, ovals, pairs, marquis, princesses, emeralds, etc. other than circular shapes, but almost perfectly symmetrical when exposed to light It is not currently known to cut diamonds into a decagonal shape resulting in a heart-and-arrow pattern that is equivalent to the heart-and-arrow pattern produced by the round-shaped round-cut diamond.

To date, it has been widely believed in the diamond industry that only round-cut diamonds produce true heart and arrow patterns. This belief is that round-cut diamonds have a nearly perfect symmetry shape, and all of their crowns and pavilion facets have less than 0.3 ° angle difference between their pavilion angles, and the main crown It is based on the fact that it can easily be cut to the same angle so that the corner intersection of facets is smaller than 0.4 ° and the corner intersection of minor crown facets can be cut smaller than 0.3 °.
This is only possible in diamonds that have been polished to resemble the nearly perfect symmetry of rounded diamonds using narrow corner intersections, known as obtaining heart and arrow patterns in round cut diamonds. The belief in the diamond industry that it is possible to obtain a true heart and arrow pattern has become widely accepted.

  A decagonal diamond has a geometric shape that is very different from that of a round diamond. Therefore, if you accept the widely accepted belief that only round-cut diamonds can produce true heart-and-arrow patterns, then dodecagons that give you a heart-and-arrow pattern equivalent to the heart-and-arrow pattern that occurs with round-cut diamonds. Polishing diamonds in shape is unexpected.

  In round cut diamonds, the heart and arrow pattern appears only if the cut facets, angle parameters, and alignment requirements are as shown in Table 1 below.

Table 1
-The shape of the diamond is completely symmetric.
• 8 main crowns and 24 secondary crown facets.
8 main bottom and 16 sub-bottom facets.
• All main facets (crown and bottom) must be polished to form a perfect 45 ° angle to each other.
• All facets are perfectly aligned.
All bottom main facets are of equal size and have an angle in the range of 40.6 ° to 41.0 °.
All bottom secondary facets are of equal size and are 1.2 ° sharper than the main facet (main bottom angle 40.6 ° to 41.0 ° + secondary 41.8 ° to 42.2 °) is there.
All main crown facets are of equal size and have an angle in the range of 33.8 ° to 35.1 °. They must be perfectly aligned on the main bottom facet.
All secondary crown facets are of equal size and are perfectly aligned on the main crown and secondary bottom facets and polished to equal corners.
Ideal cut ratio: overall depth 59.4% to 62.4%, crown height 14.5% to 16.0%, girdle thickness 1.5% to 2.95%, roundness 99. 0% to 100%, table size 53.0% to 57.5%

The diamond of the present invention corresponds to the heart-and-arrow pattern in a round diamond with a perfectly symmetric cut when exposed to light and is adapted to exhibit a naturally represented heart-and-arrow pattern. A decagonal diamond having ten pieces ,
10 main crown facets arranged symmetrically with respect to the table facet;
And 20 star facets having two star facets that are polished on all main crown facets,
10 main pavilion facets,
20 crown half facets,
With 20 pavilion half facets
20 deputy pavilion half facets,
And 10 of the sub-Pabirio Nfu Asetto,
With 10 main girdle facets,
The secondary pavilion facets are located between the secondary pavilion half facet and the main pavilion facet, and each main pavilion facet extends from the common curette point of the diamond toward only the secondary pavilion facet,
Each girdle facet is polished with a slightly uneven thickness of the girdle relative to each other, and each girdle facet is at a predetermined angle with each other such that the diamond forms a decagonal shape ,
The secondary pavilion facets are polished within a range of 48 ° to 67 °, and the secondary pavilion half facets are polished within a range of 50 ° to 70 °. BRIEF DESCRIPTION OF THE DRAWINGS The invention will become apparent from the following detailed description of the invention when read in conjunction with the drawings.

FIG. 2 is a plan view of a decagonal diamond of the present invention, representing a symmetrical arrangement of ten main crown facets on a table facet on the side of the diamond. FIG. 4 is another plan view of the decagonal diamond of the present invention, similar to FIG. 1, showing the arrangement and contrasting arrangement of the main crown facets with respect to each other. FIG. 5 is still another plan view of a decagonal diamond according to the present invention, similar to FIG. 2, showing the arrangement and arrangement of main crown facets and corresponding main pavilion facets. FIG. 3 is an additional plan view of a decagonal diamond according to the present invention, similar to FIG. 2, illustrating the arrangement and relationship of crown star facets, crown half facets and main crown facets. FIG. 5 is a bottom view of a decagonal shaped diamond of the present invention, with 10 main pavilion facets, 20 pavilion half facets, and 10 sub-facets arranged in contrast to the center or culet of the diamond. Fig. 4 represents the arrangement between the pavilion half facets and the 20 secondary pavilion facets. FIG. 3 is a side view of a decagonal diamond of the present invention, showing a secondary pavilion half facet and a secondary pavilion facet, showing that the thickness of the girdle is slightly non-uniform throughout the diamond.

  Diamond is a crystal that functions as a prism that disperses light by reflection and refraction methods. As shown in FIGS. 1-6, the diamond 10 of the present invention has a decagonal shape that surrounds the table facet (tf) in a symmetrical arrangement with other mains. Ten main crown facets (mcf's) arranged opposite to each other on the crown facet (mcf), each having essentially the same size, and ten main pavilion facets (mpf) each aligned with the main crown facet s), two crown star facets polished on all main crown facets (mcf), 20 crown star facets (csf's) of substantially equal size, pavilion half facets ( phf), preferably the number of crown star facets (csf's) Depending on the number of crown half facets (chf's), 10 secondary pavilion half facets (sphf's), 20 secondary pavilion facets (spf's), the diamond forms a decagonal shape. 10 girdle facets (gf's) having girdle facets polished at a predetermined angle to each other.

  The girdle facets gf's initially have 10 pieces that give the diamond a decagonal geometry and a slightly non-uniform girdle thickness so that all the main facets follow the shape of the stone. Polished to equal size girdle facets gf's. Each girdle facet should be equal in size and have an accurate angle of preferably 36 ° with respect to each adjacent girdle facet. Furthermore, the main crown facets are preferably polished in the range of 33.8 ° -35.2 ° angles, and more preferably of equal size and depth. Further, the main pavilion facet may be polished so as to be aligned with the main crown facet and the main girdle facet, and preferably within an angle range of 40.6 ° to 41.1 °. The secondary pavilion facets are the same throughout and are polished to be in the angular range of 48 ° to 67 °, the secondary pavilion half facets are polished to an angle that is 2-3 degrees steeper than the secondary pavilion facets, and thus Their angular range is 50 ° to 70 °.

  Then, the 20 crown star facets and the 20 crown half facets are polished with a decagonal diamond shape 10 following the pavilion half facet polish. Pavilion half facets are preferably polished to an angular range of 41.5 ° to 42.2 °. The crown half facets are preferably polished to an angular range of 37 ° to 40.8 °. The 20 crown star facets are polished so that there are 2 star facets on every main crown facet. Polishing two star facets on all main crown facets provides the extraordinary star pattern necessary to ensure that an undistorted heart and arrow pattern appears. Furthermore, the angular tolerance between all pavilion half facets and all crown half facets should not exceed 0.8 °.

  The faceting alignment should be as close as possible and preferably accurate using a microscope with a 100X magnification lens.

  To produce a decagonal diamond with a true heart and arrow pattern, equivalent to a round cut heart and arrow pattern, the diamond should be cut to meet the optimal parameters in Table I below. is there.

Table I
Overall depth 61.0% -74.5%
Table size 53.0% to 60.2%
Pavilion depth 41.2%-46.5%
Crown height 13.4% to 16.8%
Crown angle 33.8% -35.2%
Girdle thickness 0.6% -7.5%
The angle mismatch between all main facets should be less than 0.5 ° and between all star crown facets and half facets less than 0.7 °. The main facets should all be perfectly equal in terms of the angle, size and depth used, and have an angle tolerance of 0.4 °.

  An additional 10 secondary pavilion half facets (sphf's) and 20 secondary pavilion facets (spf's) allow diamonds to be processed to obtain high polish yields from raw diamonds. This makes the production cheaper and more unique for consumers. 5 and 6, reference symbol A identifies the main pavilion facet (mpf's) and reference symbol B identifies the secondary pavilion facet (spf's), so reference symbol α is the pavilion half facet (phf). In order to identify 's), the reference symbol β is used to identify the secondary pavilion facet (spf's). As shown in FIGS. 5 and 6, the main pavilion facet A and the pavilion half facet α extend only from the common curette point of diamond to the secondary pavilion facet.

Claims (8)

Corresponds to the heart and arrow pattern in a round diamond with a perfectly symmetrical cut when exposed to light, and has 10 pieces adapted to show the heart and arrow pattern that is naturally represented A decagonal diamond,
10 main crown facets arranged symmetrically with respect to the table facet;
And 20 star facets having two star facets that are polished on all main crown facets,
10 main pavilion facets,
20 crown half facets,
With 20 pavilion half facets
20 deputy pavilion half facets,
And 10 of the sub-Pabirio Nfu Asetto,
With 10 main girdle facets,
The secondary pavilion facets are located between the secondary pavilion half facet and the main pavilion facet, and each main pavilion facet extends from the common curette point of the diamond toward only the secondary pavilion facet,
Each girdle facet is polished with a slightly uneven thickness of the girdle relative to each other, and each girdle facet is at a predetermined angle with each other such that the diamond forms a decagonal shape ,
The secondary pavilion facets are polished within a range of 48 ° to 67 °, and the secondary pavilion half facets are polished within a range of 50 ° to 70 °;
A diamond with a decagonal shape.   The decagonal shape of claim 1, wherein the girdle facets are polished into ten equally sized girdle facets that form an angle of 36 ° with the girdle facets on their adjacent sides. Shaped diamond. The decagonal shape according to claim 1 or 2 , wherein the main crown facet is in an angle range of 33.8 ° to 35.2 ° and is polished to a tolerance of 0.4 °. Diamond. The ten main pavilion facets, one of the claims 1-3, characterized in that the main crown facets and the girdle facets are polished so as to be aligned in an angular range of 40.6 ° ~41.1 ° A diamond having a decagonal shape according to item 1 . The ten main pavilion facets have a decagonal shape according to any one of claims 1 to 4, wherein the ten main pavilion facets extend from a common point located at the center or curette of the diamond. diamond. Furthermore, it comprises 20 pavilion half facets of a triangular geometrical arrangement consisting of two pavilion half facets formed in a symmetrical arrangement on each main pavilion facet . A diamond having a decagonal shape according to item 1 . Each pavilion half facet is polished so as to be in an angle range of 41.5 ° to 42.2 ° and an angle range with respect to the crown half facet is 37.0 ° to 40.8 °. A diamond having a decagonal shape according to any one of claims 1 to 6 . The decagonal diamond according to any one of claims 1 to 7, wherein a tolerance of an angle between the pavilion half facet and the crown half facet does not exceed 0.8 °. .

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