Round brilliant cut gemstone and method for cutting the same
OwnerAlain Vetsinventor
Life of this patent
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Abstract
The invention relates to a gemstone (10) comprises a girdle (13), a crown (11) and a pavilion (12). The crown (11) comprises a table (14), eight star facets (15) surrounding the table (14), eight first half facets (16) aligned between the star facets (15), eight second half facets (17) aligned adjacent to the first half facets (16) and sixteen upper girdle facets (20) aligned between the second half facets (17). The pavilion (12) comprises sixteen pavilion main facets (23) and sixteen lower girdle facets (25) aligned between the pavilion main facets (23). The invention also relates to a method of cutting the gemstone.
Claims10
A gemstone, comprising:
- a girdle;
- a crown extending in a first direction from the girdle, the crown consisting of:
- a table,
- eight star facets surrounding the table,
- eight first half facets aligned between the star facets,
- eight second half facets provided adjacent to the first half facets, and
- sixteen upper girdle facets with each of the upper girdle facets provided adjacent to, and forms a common edge with another upper girdle facet to form a pair of upper girdle facets, each pair of the upper girdle facets is aligned between two adjacent second half facets, wherein the eight first half facets are each formed at an angle between 32.0° and 35.0° relative to a plane parallel to a horizontal plane of the girdle and the eight second half facets are each formed at an angle between 35.0° and 38.0° relative to the plane parallel to the horizontal plane of the girdle;
- and
- a pavilion extending from the girdle in a second direction opposite the first direction, the pavilion consisting of:
- sixteen pavilion main facets extending concentrically from a point of the pavilion distant from the girdle, and
- sixteen lower girdle facets aligned between the pavilion main facets.
A method of cutting a gemstone having a crown, a girdle, and a pavilion, the method consisting of:
- forming eight second half facets on the crown;
- forming eight first half facets adjacent to the second half facets;
- forming a table on the crown;
- forming eight star facets surrounding the table and aligning each of the star facets between two adjacent first half facets;
- forming sixteen upper girdle facets, each of the upper girdle facets provided adjacent to, and forming a common edge with another upper girdle facet to form a pair of upper girdle facets and aligning each pair of the upper girdle facets between two adjacent second half facets;
- forming sixteen pavilion main facets on the pavilion, each of the pavilion main facets extending concentrically from a point of the pavilion distant from the girdle;
- and
- forming sixteen lower girdle facets and aligning each of the lower girdle facets between two adjacent pavilion main facets, wherein the eight first half facets are each formed at an angle between 32.0° and 35.0° relative to a plane parallel to a horizontal plane of the girdle and the eight second half facets are each formed at an angle between 35.0° and 38.0° relative to the plane parallel to the horizontal plane of the girdle.
Dependencies are inferred from the claim text.