Patent ID: 8813519

Claim:
A modified princess cut diamond having a symmetrical shape possessing a hearts and arrows pattern characteristic of the true hearts and arrows pattern in a round cut diamond comprising: a tablet facet, 4 main crown facets, 8 crown halves, 8 crown star facets, 4 subsidiary crown facets, 8 subsidiary crown halves, 8 main pavilion facets, 4 subsidiary pavilion facets, 16 pavilion facet halves and a girdle with each main crown facet having a pair of crown star facets symmetrically disposed on one side thereof adjacent to the table facet, and a pair of main crown halves symmetrically disposed on the opposite side thereof, with each pair of crown star facets having a side thereof adjoining the table facet meeting at a point equal to essentially half the longer distance of the main crown facet measured horizontally, and with all crown star facets having identical polished angles and with the subsidiary crown halves adjacent each main crown facet having identical polished angles measured from the surface of the table facet to a maximum tolerance of 0.3°, with each of the crown halves polished into alignment with each other and into alignment with the pavilion facet halves, and that the subsidiary crown halves are aligned in common at each end of the diamond to form a cut corner in the diamond at each such end thereof, with each of the subsidiary crown halves at each end of the diamond, having a polished angle smaller than the main crown halves for forming an included angle of 45° with an abutting one of the adjacent main crown-halves, and wherein the angle of the pavilion halves is steeper than the main pavilion angle, wherein the main crown and pavilion facets having the following cut angles: main pavilion angles 40.6°-41.0° main crown angles 34.0°-35.2°; and subsidiary crown facet angles are between 33.5°-34.5°.