Brilliantized step cut stone

Details Brilliantized step cut stone Brilliantized step cut stone

1976-12-27

1978-10-10

Shay, F. Barry

Jewelry

Gem

A44C 1700

Patent

active

041189493

ABSTRACT:
A brilliantized step cut diamond has a straight edged polygonal shaped girdle with sides and corner facets; a crown with a table and a table-and-girdle breaks which are faceted; and a pyramidal base having a point culet, a culet break and a girdle break with ridges extending from the culet to the corner of the girdle. A fan with three pairs of triangular halves is disposed symmetrically about each ridge with a triangular facet in each corner of the base having an edge which is colinear with the edge of a corner facet and an apex at a ridge. The angle between the culet break and the plane of the girdle is between 30.degree. and 43.degree..

REFERENCES:
patent: 668318 (1901-02-01), Patton
patent: 2207869 (1940-07-01), Monnier

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