Hearts & Arrows SiC Gemstone

Abstract

The instant application discloses, among other things, a specific set of cutting proportions tailored for the optical characteristics of Silicon Carbide (“SiC”) which may produce a “Hearts & Arrows” reflection pattern.

1 . An SiC gemstone displaying a hearts and arrows pattern, comprising:
 a crown portion, comprising:
 a table cut perpendicular to a C-axis of the gemstone; 
 a plurality of crown main facets cut at an angle of between 31.81 and 32.01 degrees; 
 a plurality of crown girdle facets cut at an angle of between 38.90 and 39.10 degrees; 
 a plurality of star facets cut at an angle of between 21.36 and 21.56 degrees; 
   a pavilion portion comprising:
 a plurality of pavilion main facets cut at an angle of between 40.60 and 40.80 degrees; 
 a plurality of pavilion girdle facets cut at an angle of between 41.74 and 41.94 degrees; and 
   a girdle portion abutting the crown portion and extending along a predetermined plane.   
     
     
         2 . The SiC gemstone of  claim 1  wherein there are 8 crown main facets. 
     
     
         3 . The SiC gemstone of  claim 1  wherein there are 16 crown girdle facets. 
     
     
         4 . The SiC gemstone of  claim 1  wherein there are 8 star facets. 
     
     
         5 . The SiC gemstone of  claim 1  wherein there are 8 pavilion main facets. 
     
     
         6 . The SiC gemstone of  claim 1  wherein there are 16 pavilion girdle facets. 
     
     
         7 . The SiC gemstone of  claim 1  wherein the SiC is selected from a group comprising 6H, 4H, 2H, and 3C SiC.