Patent ID: 7000607
Filing Date: 2006-02-21
Classification: A44C

Abstract:
1. A method for cutting a gemstone from a block of gemstone material, the block having an initial shape corresponding substantially to a pyramid having a square base, the method comprising: (a) processing the block to generate two pairs of girdle edges lying on a square of side D (b) removing material from a first pair of diagonally opposing corners of the block substantially adjacent to the base so as to generate a third pair of girdle edges separated by a distance substantially equal to D (c) removing material from the second pair of diagonally opposing corners of the block substantially adjacent to the base so as to generate a pair of girdle edges separated by a distance D (d) shaping the base of the block to form a plurality of crown facets; and (e) shaping the pyramid to form a plurality of pavilion facets, thereby forming an ornamental gemstone having a girdle substantially bounded by said pairs of girdle edges.