Gemstone having hearts and arrows cushion-cut

Abstract

A gemstone is configured to yield a hearts and arrows pattern when subjected to light. The gemstone has a length, a width and a height. The gemstone includes a crown portion, a girdle and a pavilion portion. The crown portion has a height of about 10-14.5% of the length of the gemstone and has four sides and four corners where the four corners connect the four sides to each other. The crown portion includes an octagonal table facet, 8 star facets of equal geometry and dimension positioned around the octagonal table facet so as to enclose the octagonal table facet, and other facets. The girdle has a variable thickness extending circumferentially along the gemstone. The pavilion portion has a height of about 45.5-54% of the length of the gemstone and includes 8 main pavilion facets, 16 pavilion half facets positioned around the main pavilion facets, and other facets.

What is claimed is: 
     
         1 . A gemstone configured to yield a hearts and arrows pattern when subjected to light, the gemstone having a length, a width and a height, the gemstone comprising:
 a crown portion having a height of about 10-14.5% of the length of the gemstone and having four sides and four corners, the corners connect the four sides to each other, the crown portion comprising:
 an octagonal table facet; 
 8 star facets of equal geometry and dimension positioned around the octagonal table facet so as to enclose the octagonal table facet; 
 4 first main crown facets of equal geometry and dimension positioned on the four corners of the crown portion such that each first main crown facet is adjacent to two star facets; 
 4 second main crown facets of equal geometry and dimension positioned on the four sides of the gemstone; 
 16 crown upper girdle facets positioned around the 4 first main crown facets and 4 second main crown facets so as to form an outer periphery of the crown portion; 
   a girdle having a variable thickness extending circumferentially along the gemstone; and   a pavilion portion having a height of about 45.5-54% of the length of the gemstone, the pavilion portion comprising:
 8 main pavilion facets; 
 16 pavilion half facets positioned around the main pavilion facets; and 
 at least 4 pavilion lower girdle facets positioned adjacent the girdle such that each pavilion lower girdle facet is disposed between the girdle and at most two pavilion half facets. 
   
     
     
         2 . The gemstone of  claim 1 , wherein the pavilion portion includes 8 pavilion lower girdle facets. 
     
     
         3 . The gemstone of  claim 1 , wherein the pavilion portion includes 16 pavilion lower girdle facets. 
     
     
         4 . The gemstone of  claim 3 , wherein the pavilion portion further comprises 8 pavilion upper girdle facets disposed between the girdle and the pavilion lower girdle facets. 
     
     
         5 . The gemstone of  claim 4 , wherein the pavilion upper girdle facets are positioned in the pavilion portion at the corners of the gemstone. 
     
     
         6 . The gemstone of  claim 1 , wherein the 4 pavilion lower girdle facets are positioned adjacent to the girdle at about a mid-point of each side of the gemstone. 
     
     
         7 . The gemstone of  claim 1 , wherein the 4 pavilion lower girdle facets are positioned adjacent to a portion of the girdle having the maximum thickness. 
     
     
         8 . The gemstone of  claim 1 , wherein the four corners have an arcuate profile and each corner has an equal radius resulting in the diamond being symmetrical and having a cushion cut configuration. 
     
     
         9 . The gemstone of  claim 1 , wherein the gemstone when visually observed through a conventional scope in the presence of light forms:
 exactly 8 symmetrical aligned arrows;   exactly 8 symmetrical aligned hearts; and   8 arrowheads proximal to the center of the gemstone.   
     
     
         10 . The gemstone of  claim 9 , wherein the arrowheads include a pointed portion and an inward portion.