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US 2025/0107600 A1Published application
Gemstone
AssigneeIdd Limited
InventorsIan B. DOUGLAS, Michiel J. BOTHA
Life of this patent
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Abstract
The present invention provides a gemstone comprising a girdle dividing the gemstone into a pavilion and a crown having a table surface; a tier of facets cut into the pavilion at a position immediately below the girdle; and a continuous groove. The groove facilitates mounting to a collet having a mounting rim. The continuous groove is located in the tier of the facets cut into the pavilion. The placement of the tier of facets and continuous groove does not obstruct light return.
Claims19
A gemstone comprising:
- a) a girdle dividing the gemstone into a pavilion and a crown having a table surface;
- b) a tier of facets cut into the pavilion at a position immediately below the girdle;
- and
- c) a continuous groove to facilitate mounting to a collet having a mounting rim, the continuous groove located in the tier of facets cut into the pavilion wherein the placement of the tier of facets and continuous groove does not obstruct light return.
1 more element
A gemstone comprising:
- a) a girdle dividing the gemstone into a pavilion and a crown having a table surface;
- b) a tier of facets cut into the pavilion at a position immediately below the girdle;
- and
- c) a continuous groove to facilitate mounting to a collet having a mounting rim, the continuous groove located in the tier of facets cut into the pavilion, and having a first surface substantially parallel to the table surface of the crown and a second surface inclined relative to the first surface at an angle of between about 60 and 80 degrees, wherein the placement of the tier of facets and continuous groove does not obstruct light return.
1 more element
A method providing a gemstone comprising:
- a) cutting a tier of facets into a pavilion of a gemstone at a position immediately below a girdle of the gemstone and b) forming a continuous groove in the tier of facets to facilitate mounting of the gemstone to a collet having a mounting rim wherein the placement of the tier of facets and continuous groove does not obstruct light return.
Dependencies are inferred from the claim text.