Diamond cutting method and diamond provided by the method
AssigneeTokyo Shinzyu Co., Ltd.
InventorTakeshi Aoyagi
Life of this patent
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Abstract
Ten of pavilion main facets are formed with reference to the previously formed five of first pavilion main facets in which an initial first main facet is formed in a position centered on a line shifted approximately fifteen degrees from the ridge of the row diamond on the pavilion side. Ten of pavilion main facets 19 radiate from the curette 18 and twenty of lower girdle facets are formed between the adjacent pavilion main facets on the pavilion side of the diamond 1.
Claims19
A method of cutting diamond for providing a diamond with a generally trapezoidal conic crown having a flat table on top, a generally conic pavilion having an acute curette at the center, and a strip-like girdle provided on the lateral surface along the boundary of said crown and said pavilion comprising:
- a first step of forming an initial first pavilion main facet centered on a line shifted approximately fifteen degrees from a ridge formed on the pavilion side of a row diamond in crystal form and the remaining first pavilion main faces subsequently, which totals five of first pavilion main facets, and
- a second step of forming ten of second pavilion main facets centered on the boundary lines between said first pavilion main facets.
A method of cutting diamond for providing a diamond with a generally trapezoidal conic crown having a flat table on top, a generally conic pavilion having an acute curette at the center, and a strip-like girdle provided on the lateral surface along the boundary of said crown and said pavilion comprising:
- a first step of forming an initial first crown main facet centered on a line shifted approximately fifteen degrees from a ridge formed on the crown side of a row diamond in crystal form and the remaining first crown main faces subsequently, which totals five of first crown main facets, and
- a second step of forming ten of second crown main facets centered on the boundary lines between said first crown main facets.
Dependencies are inferred from the claim text.