Gemstone cut

a technology of gemstones and cut stones, applied in the field of gemstone cutting, can solve the problems of reducing the yield of diamonds, so as to achieve the effect of improving yield and yield

Inactive Publication Date: 2005-04-21
RIEMER YAIR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006] The present invention provides a new way of cutting gemstones and diamonds, which provides diamonds, which are have brilliance comparable with and even greater than conventional or hybrid diamonds and which produce a better yield than conventional cut diamonds. The new cut known as the “Riemer” cuts provides an improved yield of approximately 30% compared with conventional diamond cuts. The “Riemer” cut is applicable to all shapes of stones including round, square, oval, marquise, pear-shaped and rectangular stones. The “Riemer” cut may be utilized with different diamond cuts such as Princess and Radian cut.

Problems solved by technology

However, in order to produce a brilliant cut diamond having good reflection and refraction (light dispersion), a relative large amount of the diamond raw material is wasted.
Currently, 50%-80% of a diamond is wasted during the cutting process.
Previously, the traditional practice was to limit the angle of the base facets to less than 43% to obtain an acceptable reflection and refraction, which limited the potential saving and the consequent increase in yield.
However, the quality and fire of the stone suffered.
However, since many of the facets are added after the bottom pavilion facets have already been cut, there is in fact no improvement in yield.

Method used

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Embodiment Construction

[0054] The present invention is directed to a new method of cutting a gemstone which increases the yield while achieving a achieving a brilliance and having light dispersion.

[0055] The accepted theory in the gem industry that the optimal angle of the base facets is roughly 41 degrees and that even small deviations from this figure will affect the brilliance of the stone has unduly limited the development of other methods of cutting stones. The inventor has realized that, contrary to standard practice, by cutting the base with fewer pavilions there will be a substantially increase in the yield. Thus, for example, a one carat brilliant cut stone may be produced from a rough stone weighing approximately 1.3-1.4 carat, compared with standard cuts which use a rough stone weighing approximately 1.7 to 2 carats to achieve a one carat stone. As will be appreciated such an improvement in yield (of approximately 30%) is especially significant in the diamond industry, where stones are relativ...

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PUM

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Abstract

A new method of cutting a gemstone known as the “Riemer” cut is provided. The gemstone has a crown portion, a pavilion portion characterized by having four main pavilion facets and a culet base and girdle portion provided between the crown portion and pavilion portion. The main pavilion facets are integrally formed with the culet base thereby creating a pavilion facet base. The “Riemer” cut is applicable to all shapes of stones including round, square, oval, marquise, pear-shaped and rectangular diamonds.

Description

FIELD OF THE INVENTION [0001] The present invention relates to gemstones such as diamonds and more particularly to the cut of the gemstone. BACKGROUND OF THE INVENTION [0002] The value of a diamond is determined by several parameters including clarity, weight, shape, color, and polish. The cut of the gemstone is generally chosen to maximize the fire of the diamond. [0003] However, in order to produce a brilliant cut diamond having good reflection and refraction (light dispersion), a relative large amount of the diamond raw material is wasted. Currently, 50%-80% of a diamond is wasted during the cutting process. Thus in order to obtain a one carat stone, it is not unusual for the diamond cutter to start with a rough stone weighing 1.7 carat, for example. Since the price per carat increases exponentially in proportion to the carat weight, it is highly desirable to reduce the waste and increase the yield from a rough stone. [0004] Yields may be increased during the faceting process by ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A44C17/00
CPCA44C17/001
Inventor RIEMER, YAIR
Owner RIEMER YAIR
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