Stone cut and method of making

Abstract

A stone cut and method for cutting a stone that increases the number of facets on the stone as well as the scintillation, brilliance, and light reflectivity of the stone. The stone cut and method includes cutting angles and increasing the number of facets that, either separately or together, manage the external and internal light flow dynamics of a round cut diamond to a higher level of efficiency, effectiveness, and performance.

Description

CROSS REFERENCE TO RELATED APPLICATION [0001] The present application is a continuation of U.S. patent application Ser. No. 10 / 619,982, filed Jul. 14, 2003, which is incorporated herein by reference in its entirety.FIELD OF THE INVENTION [0002] Generally, the present invention relates to a cut precious stone and a method for cutting a precious stone. More particularly, the method for cutting the precious stone and the cut of the precious stone of the present invention produces a precious stone with more brilliance, scintillation, and light dispersion. BACKGROUND OF THE INVENTION [0003] Traditionally, gemstones have been cut in many shapes and configurations. Typically, precious stones, such as diamonds, are cut to accent high coefficients of brilliancy, scintillation, and dispersion of light. In general, gemstones, particularly diamonds, are cut such that light entering upper portions of the stone are totally reflected and refracted within the stone, and light also emerges back thro...

AI Technical Summary

Benefits of technology

[0008] An embodiment of the present invention provides a stone cut and a method for cutting a stone providing increased scintillation, brilliance, and dispersion of light. The cut, in accordance with one aspect of the invention, has a girdle, crown, and pavilion, and includes an increased number of facets on either or both the crown or the pavilion over the traditional number of facets. The increased number of facets may be obtained by providing additional upper girdle facets (over the traditional number) surrounding the perimeter of the stone above the girdle. According to an embodiment of the present invention, the upper girdle facets preferably extend from a lower side along the girdle of the stone to a common upper vertex located toward a table on the crown. Preferably, there are three upper girdle facets per side of the table.

[0009] According to another embodiment of the present invention, the increased number of facets may be obtained by providing additional lower girdle facets (over the traditional number) on the pavilion of the stone. The increased number of facets on the pavilion portion results from an increase in the number of lower girdle facets. Preferably, the lower girdle facets are positioned between each pair of pavilion main facets and extend from an upper side along a girdle of the stone to a portion of the pavilion. Also preferably, there are three lower girdle facets between each pavilion main facet.

Problems solved by technology

The traditional round brilliant cut model, due to its unique faceting arrangements, has limited ability to return white light significantly.

The loss of light through the bottom of the diamond creates dead zones.

Furthermore, due to the light return and internal light flow efficiencies of the round brilliant cut model, the proportions that are necessary for this model to achieve optimal light performance requires extraordinary loss of rough diamond material during the cutting process.

Although, at the optimal light performance level for the traditional model, the diamond appears more impressive than the poorly cut diamonds, the magnitude and quality of brilliance, dispersion and scintillation that a round shape diamond cut is capable of achieving is not maximized.

Nonetheless, the current desire of many cutters to cut diamonds to the ideal cut proportions of the traditional round brilliant cut is discouraged by the requirements of significant weight loss of the rough diamond material.

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