Step-Cut Gemstone
First Claim
1. A gemstone comprising:
- a crown disposed above a girdle; and
a pavilion disposed below the girdle;
wherein the girdle comprises;
twelve straight-edged facets defining four sides and four corners of the girdle, wherein the four sides each comprise one straight-edged facet and the four corners each comprise two straight-edged facets meeting at a corner midpoint;
wherein the crown comprises;
a table; and
two or more rows of step-cut facets between the table and the girdle, the rows comprising side step-cut facets being elongated trapezoids in shape and corner step-cut facets, and each row comprising twelve step-cut facets.
2 Assignments
0 Petitions
Accused Products
Abstract
A cushioned step-cut gemstone is disclosed. The gemstone may include a crown disposed above a girdle and a pavilion disposed below the girdle. The girdle may include twelve straight-edged facets defining four sides and four corners of the girdle, wherein the four sides each comprise one straight-edged facet and the four corners each comprise two straight-edged facets meeting at a corner midpoint. The crown may include a table and two or more rows of step-cut facets between the table and the girdle. The step-cut facets may include side step-cut facets shaped like elongated trapezoids and corner step-cut facets, and each step-cut row includes twelve step-cut facets.
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Citations
20 Claims
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1. A gemstone comprising:
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a crown disposed above a girdle; and a pavilion disposed below the girdle; wherein the girdle comprises; twelve straight-edged facets defining four sides and four corners of the girdle, wherein the four sides each comprise one straight-edged facet and the four corners each comprise two straight-edged facets meeting at a corner midpoint; wherein the crown comprises; a table; and two or more rows of step-cut facets between the table and the girdle, the rows comprising side step-cut facets being elongated trapezoids in shape and corner step-cut facets, and each row comprising twelve step-cut facets. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A gemstone comprising:
a crown, a girdle, and a pavilion, wherein the girdle comprises twelve straight-edged facets defining four sides and four corners of the girdle, wherein the four sides each comprise one straight-edged facet and the four corners each comprise two straight-edged facets; wherein the pavilion includes four pavilion corners; wherein each pavilion corner includes an elongated, pentagonal facet and three triangular facets; and wherein the gemstone comprises a width, a height, a crown height, a table width, a pavilion height, and a girdle height; and wherein the ratio of the width to the height is 1.00 to 0.70-0.75, the ratio of the width to the crown height is 1.00 to 0.20-0.25, the ratio of the width to the table width is 1.00 to 0.35-0.45, the ratio of the width to the pavilion height is 1.00 to 0.43-0.53, and the ratio of the width to the girdle height is 1.00 to 0.015-0.035. - View Dependent Claims (13, 14, 15)
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16. A gemstone comprising:
a crown, a girdle, and a pavilion; wherein the girdle comprises four sides, each side comprises one rectangular facet, and four girdle corners, each girdle corner comprising two rectangular facets meeting at a corner midpoint; wherein the pavilion is disposed beneath the girdle and comprises four pavilion corners; wherein each pavilion corner includes an elongated, pentagonal facet comprises a point meeting the corner midpoint, and three triangular facets; wherein the crown comprises a table and two or more rows of step-cut facets between the table and the girdle, the rows comprising side step-cut facets being elongated trapezoids in shape and corner step-cut facets, and each row comprising twelve step-cut facets; wherein the gemstone further includes a width, a height, a crown height, a table width, a pavilion height, and a girdle height; and wherein the ratio of the width to the height is about 1.00 to 0.721, the ratio of the width to the crown height is about 1.00 to 0.216, the ratio of the width to the table width is about 1.00 to 0.423, the ratio of the width to the pavilion height is about 1.00 to 0.481, and the ratio of the width to the girdle height is about 1.00 to 0.024. - View Dependent Claims (17, 18, 19, 20)
Specification