Step-Cut Gemstone

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.

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.