Cushion shaped hearts and arrows gemstone and method
A diamond which will display a heart and arrows pattern characteristic substantially conforming to the hearts and arrows pattern inherently generated in a symmetrically polished round cut diamond when subjected to light. The diamond is polished in a symmetrical shape having four main crown facets on the long sides of the diamond, four main crown facets on the corner sides of the diamond, a table facet, 8 crown star facets adjacent the table facet, 16 crown half facets, 8 main pavilion facets, 16 pavilion half facets, 4 subsidiary pavilion facets, 16 subsidiary pavilion half facets with each subsidiary pavilion facet postioned adjacent two pavilion half facets and multiple girdle facets of varying thickness on both the long and corner sides of the diamond. The hearts and arrows pattern generated by this gemstone forms 8 symmetrically aligned arrows and 8 symmetrically aligned hearts when visually observed through a conventional scope in the presence of light.
1. A diamond comprising four long sides interconnected to one another by four corner sides forming a symmetrical shaped diamond possessing a hearts and arrows pattern characteristic of the true hearts and arrows pattern in a round cut diamond when subjected to light comprising: 4 main crown facets of substantially equal geometry and dimension symmetrically positioned on the four long sides of the diamond, 4 main crown facets of substantially equal geometry and dimension symmetrically positioned on the four corner sides of the diamond, a table facet, 8 crown star facets adjacent the table facet, 16 crown half facets, 8 main pavilion facets, 16 pavilion half facets, 4 subsidiary pavilion facets, 16 subsidiary pavilion half facets and multiple girdle facets on both the long and corner sides of the diamond wherein the hearts and arrows pattern generated by the diamond gemstone forms exactly 8 symmetrical aligned arrows and exactly 8 symmetrical aligned hearts when visually observed through a conventional scope in the presence of light.
2. A diamond as defined in claim 1 wherein the table facet has a substantially square shape with four cut corners.
3. A diamond as defined in claim 1 wherein the area of the 4 main crown facets on the long sides is greater than the area of the 4 main crown facets on the corner sides.
4. A diamond as defined in claim 1 wherein said four subsidiary pavilion facets are symmetrically positioned on the pavilion side of the diamond with each subsidiary pavilion facet positioned adjacent two pavilion half facets.
5. A diamond as defined in claim 1 wherein the girdle facets vary in thickness from 2.5%-7.5%.
6. A diamond as defined in claim 5 wherein there are 40 girdle facets on the four long sides of the diamond and 28 girdle facets on the four corner sides.
7. A diamond as defined in claim 1 wherein the four long sides are substantially equal in length and are arranged in pairs with each pair having substantially parallel sides.
8. A diamond as defined in claim 7 wherein the four corner sides have an equal radius resulting in the diamond being symmetrical and having a cushion cut configuration.
9. A diamond as defined in claim 8 wherein the four crown facets disposed on the long sides of the diamond have a geometry of substantially quadrilateral shape with two pairs of substantially parallel sides.
10. A diamond as defined in claim 9 wherein the main pavilion facets meet at a common point.
11. A diamond as defined in claim 10 wherein the main crown facets, pavilion facets and corner facets have the following cut angles:
main pavilion angle degree range: 40.6° -41.1°
main crown angle degree range: 34.2° -35.1°, and
corner main crown angle degree range: 33.7° -34.8°.
12. A diamond as defined in claim 11 wherein the subsidiary pavilion facets and the pavilion halve facets have the following cut angles:
subsidiary pavilion angle degree range: 63° -67.5°
pavilion halve angle degree range: 64.5° -70.5°.