Gemstone

Abstract

A gemstone includes four equal concave portions, a table, a girdle, an upper portion and a lower portion. The upper portion has two stairs. The lower portion includes four surfaces which are broken by eight additional surfaces. Each of the eight surfaces is broken by another two surfaces.

What is claimed is:  
     
         1 . A gemstone comprising a girdle, a crown with said crown disposed above said girdle; 
 a table with said table disposed above said crown; and    a plurality of concave portions.    
     
     
         2 . The gemstone as claimed in  claim 1  in which said plurality of concave portions comprise four equal concave portions.  
     
     
         3 . The gemstone as claimed in  claim 1  in which said crown comprises a first stair and a second stair, with said first stair disposed closest to said girdle and with said second stair disposed furthest from said girdle.  
     
     
         4 . The gemstone as claimed in  claim 1  in which said girdle lies substantially in a girdle plane and in which said first stair is at an angle of about 40 to 45 degrees relative to said girdle plane.  
     
     
         5 . The gemstone as claimed in  claim 1  in which said girdle lies substantially in a girdle plane and in which said second stair is at an angle of about 30 to 35 degrees relative to said girdle plane.  
     
     
         6 . The gemstone as claimed in  claim 3  in which said first stair comprises eight facets.  
     
     
         7 . The gemstone as claimed in  claim 3  in which said second stair comprises four facets.  
     
     
         8 . The gemstone as claimed in  claim 7  in which each of said four facets on said second stair comprises two additional facets.  
     
     
         9 . The gemstone as claimed in  claim 8  in which each of said two additional facets on said second stair is at an angle of about 25 degrees relative to said girdle plane.  
     
     
         10 . The gemstone as claimed in  claim 1  further comprising a lower portion with said lower portion disposed below said girdle and with said lower portion comprising four facets.  
     
     
         11 . The gemstone as claimed in  claim 10  in which each of said four facets on said lower portion comprises two additional facets, thereby forming a first set of additional facets.  
     
     
         12 . The gemstone as claimed in  claim 11  in which each of said two additional facets comprises two additional facets, thereby forming a second set of additional facets.  
     
     
         13 . The gemstone as claimed in  claim 10  in which said four facets in said lower portion is at an angle of about 60 to 65 degrees relative to said girdle plane.  
     
     
         14 . The gemstone as claimed in  claim 11  in which each of said two additional facets of said first set of additional facets on said four facets of said lower portion is at an angle of about 40 to 41 degrees relative to said girdle plane.  
     
     
         15 . The gemstone as claimed in  claim 12  in which each of said two additional facets of said second set of additional facets is at an angle of about 42.5 to 43.5 degrees relative to said girdle plane.  
     
     
         16 . The gemstone as claimed in  claim 12  in which each of said two additional facets formed on said second set of additional facets forms a third set of sixteen facets.  
     
     
         17 . The gemstone as claimed in  claim 1  in which said plurality of concave portions comprises four concave facets.