Patent ID: 6694778
Filing Date: 2004-02-24
Classification: A44C

Abstract:
A cut diamond comprising a crown having a substantially frustum shape above a girdle and a substantially conic pavilion below the girdle, the crown having a table facet on a top of the crown and crown facets on the cut diamond outer surface, the crown facets including crown main facets, star facets between the circumference of the table facet and the crown main facets, and upper girdle facets between the girdle and the crown main facets, and the pavilion having pavilion facets on the cut diamond outer surface, the pavilion facets including pavilion main facets and lower girgle facets between the girdle and the pavilion main facets, wherein:a pavilion angle (p) between the pavilion main facets and a the girdle section is an angle that falls between or is equal to 45 degrees and 37.5 degrees and a crown angle (c) between the crown main facets and the girdle is an angle in angular degrees that satisfies the following condition: âˆ’3.5Ã—p+163.6&gE;c&gE;âˆ’3.8333Ã—p+174.232.