Round cut gemstone exhibiting excellent optical brilliance
a technology of optical brilliance and diamonds, applied in the field of excellent optical brilliance of diamonds, can solve the problems of high demand for round diamonds, relatively low yield, and high cost of each carat retained, and achieve excellent”) light performance, exceptional brilliance and scintillation, and enhanced light performance characteristics
Inactive Publication Date: 2016-06-16
HASENFELD STEIN
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Benefits of technology
The present invention is about improving the brilliance of round cut diamonds by using a unique combination of angles and faceting. This creates exceptional fire, brilliance, and scintillation. The use of 73 facets (40 in the crown and 33 in the pavilion) achieves significantly enhanced light performance. This results in a gemstone with significantly better light performance than standard round cut diamonds. The average light performance of the present invention is 96% and it has been graded as "Round Brilliant" and "Very High" in fire, brillance, and sparkle by GEMEX.
Problems solved by technology
Round diamonds cost more on a per carat basis than fancy shapes for two reasons; the demand for round diamonds is very high, and the yield is relatively low.
Because more of the rough stone is lost in the cutting of a round diamond, the cost of each carat retained is higher.
However, just increasing or decreasing the number and angle of the facets does not directly correlate to an increase in light performance.
In fact, sometimes an increase in the number of facets can result in a diamond that is dull and lifeless, exactly the opposite of what is desired.
Method used
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[0016]The present invention will next be illustrated with reference to the figures. Such figures are intended to be illustrative rather than limiting and are included herewith to facilitate the explanation of exemplary features of embodiments of the present invention. Unless otherwise noted, the figures are not to scale, and are not intended to serve as engineering drawings.
[0017]Referring now to the drawings, FIG. 1 is a side elevation view of a round cut diamond 1 according to the present invention. Although the following description relates to a round cut diamond, it will be readily apparent to one of skill in the art that the unique angles and faceting described herein can be applied to any precious or semi-precious gemstone.
[0018]As shown in FIG. 1, the round cut diamond 1 includes a substantially circular girdle 2; a crown 3 extending in a first direction from the girdle 2; and a pavilion 4 extending in a second direction from the girdle 2 opposite the first direction. The rou...
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A gemstone including a substantially round girdle, a crown extending in a first direction from the girdle, and a pavilion extending in a second direction from the girdle opposite the first direction. The gemstone has 73 uniquely arranged and angled facets, 33 of which are in the crown, and 40 of which are in the pavilion. The height of the crown is preferably between 12.5 to 19.5% of the diameter of the stone, the total depth of the stone is preferably between 59-62.9% of the diameter of the stone, the depth of the pavilion is between 42.9 to 44.5% of the diameter of the stone, and the diameter of the table is preferably between 53-60% of the diameter of the stone.
Description
CROSS REFERENCE TO RELATED APPLICATIONS[0001]The present application claims priority to Provisional Patent Application No. 62 / 090,617, filed Dec. 11, 2014, the entire contents of which are incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to round cut gemstones exhibiting excellent optical brilliance. In particular, the present invention relates to a round-cut diamond with superior optical characteristics compared to that of industry standard round cut diamonds.BACKGROUND OF THE INVENTION[0003]The round cut diamond is the most popular diamond shape, representing approximately 75% of all diamonds sold. Due to the mechanics of its shape, the round diamond is generally superior to fancy diamond shapes for reflection of light, thereby maximizing potential brightness. Virtually all round diamonds are brilliant-cut, meaning they have 58 facets (or 57 facets when there is no culet present).[0004]Round diamonds cost more on a per carat basis than fan...
Claims
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IPC IPC(8): A44C17/00
CPCA44C17/00A44C17/002A44C17/001
Inventor HASENFELD, HERTZLORINCZ, ZYSHE
Owner HASENFELD STEIN