Cut cornered square mixed-cut gemstone

Details Cut cornered square mixed-cut gemstone Cut cornered square mixed-cut gemstone

1998-12-01

1999-10-26

Green, Brian K.

Jewelry

Gem

A44C 1700

Patent

active

059707445

ABSTRACT:
A cut cornered mixed-cut square gemstone comprises a step-cut crown, with two steps and a table, a girdle and a pavilion. The crown and pavilion are substantially square with four equal sides, and corners about 1/3 the length of the sides. The pavilion sides and corners are defined by eight rib lines which extend substantially continuously from the girdle to a culet. Each pavilion side and corner has four facets, including a lower girdle star facet, two lower girdle facets and a lower bezel facet. The gemstone has the classic elegance of a step cut in the crown and attempts to achieve the good dispersion of a brilliant cut in the pavilion.

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Peinarr, H.S., "A New Standard Mixed Cut for Diamonds", Gems and Gemology, Winter, 1971-72.
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GIA Gem Trade Laboratory Diamond Grading Report No. 0421726 for Cut-Cornered Rectangular Mixed-Cut, dated Jul. 30, 1998.

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