Gemstone and corresponding method of cutting

Details Gemstone and corresponding method of cutting Gemstone and corresponding method of cutting

2006-02-21

2006-02-21

Lavinder, Jack W. (Department: 3677)

Stone working

Precious stone working

C451S021000, C063S032000

Reexamination Certificate

active

07000607

ABSTRACT:
A gemstone having a crown, a girdle and a pavilion, wherein the girdle is shaped such that, when viewed in plan view, it is primarily bounded by four pairs of parallel straight edges. Three of the four pairs of edges are spaced by roughly equal spacing D1, while the remaining pair of edges is spaced by a spacing D2, wherein D2is greater than D1by between 10% and 40%. Also provided is a method for cutting such a gemstone.

REFERENCES:
patent: 5190024 (1993-03-01), Senanayake
patent: 5657646 (1997-08-01), Rosenberg
patent: 6363745 (2002-04-01), Greeff
patent: D466045 (2002-11-01), Yacoubian
patent: D498698 (2004-11-01), Davidi

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