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US 4,020,649 AGranted
Brilliantized step cut diamond
OwnerHenry Grossbardinventor
Life of this patent
Estimating the term…
Abstract
A step cut stone with a straight edged polygonal shaped girdle has a generally pyramidal base and a crown with at least girdle and table breaks wherein at least one of these breaks is cut with triangular shaped facets.
Claims8
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 being cut with triangular shaped facets and said girdle break being cut with guadrilaterally shaped facets;
- and a pryamidal 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 each fan, and a shield shaped facet on each side of the base on 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.