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US 4,118,950 AGranted
Brilliantized step cut stone with faceted crown
OwnerHenry Grossbardinventor
Life of this patent
Estimating the term…
Abstract
A brilliantized step cut diamond has a straight edged polygonal shaped girdle with side 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.
Claims7
A brilliantized step cut diamond comprising:
- a straight edged polygonal shaped girdle with a plurality of side facets and corner facets;
- a crown, said crown having a girdle break, a table break and a table, said table break and said girdle break being cut with triangular shaped facets;
- and a pyramidal base, said pyramidal base having a girdle break, a culet break, a point culet and a plurality of ridges, each of said ridges extending from said culet toward a corner, a fan of at least three pairs of triangular halves symmetrically disposed about each ridge of said pyramidal base, a kite shaped facet on each side of the base on the culet break and disposed between a pair of adjacent fans, and a shield shaped facet on each side of the base in the girdle break, each shield shaped facet having a base line parallel to the girdle and an apex in contact with a point of the associated kite shaped facet.
Dependencies are inferred from the claim text.