Stone cut and method of making

Abstract

A stone cut and method for cutting a stone that increases the number of facets on the stone as well as the scintillation, brilliance, and light reflectivity of the stone. The stone cut and method includes cutting angles and increasing the number of facets that, either separately or together, manage the external and internal light flow dynamics of a round cut diamond to a higher level of efficiency, effectiveness, and performance.

1 . A stone, comprising: 
 a pavilion portion having a culet;    a crown portion having a table;    a girdle separating said pavilion portion from said crown portion;    a plurality of pavilion main facets extending between said girdle and said culet;    at least three lower girdle facets positioned between adjacent pavilion main facets, each of said at least three lower girdle facets having a top side along said girdle, wherein only two of said at least three lower girdle facets have a common lower vertex extending towards said culet and a third lower girdle facet of said at least three lower girdle facets has a separate lower vertex extending towards said culet;    a plurality of bezel facets extending between said girdle and said table; and    at least three upper girdle facets positioned between adjacent bezel facets, each of said at least three upper girdle facets having a common upper vertex extending towards said table, wherein each of said at least three upper girdle facets has a bottom side along said girdle.    
   
   
       2 . The stone of  claim 1 , wherein said crown includes a plurality of star facets encircling said table, and a bezel facet positioned between adjacent star facets and said girdle.  
   
   
       3 . A stone, comprising: 
 a pavilion portion having a culet;    a crown portion;    a girdle separating said pavilion portion from said crown portion;    a plurality of pavilion main facets extending between said girdle and said culet; and    at least three lower girdle facets between each adjacent pair of said pavilion main facets, wherein at least one of said at least three lower girdle facets is rotated so that said at least one of said at least three lower girdle facets is not tangent to a circumference about said stone.    
   
   
       4 . The stone of  claim 3 , wherein a middle of said three lower girdle facets is rotated.  
   
   
       5 . A stone, comprising: 
 a pavilion portion having a culet;    a crown portion having a table with a predetermined number of sides;    a girdle separating said pavilion portion from said crown portion; and    at least three lower girdle facets for each side of said table, each of said at least three lower girdle facets having a top side along said girdle, wherein only two of said at least three lower girdle facets have a common lower vertex extending towards said culet; and    at least three upper girdle facets for each side of said table, each of said at least three upper girdle facets having a bottom side along said girdle, wherein said at least three upper girdle facets have a common upper vertex extending toward said table.    
   
   
       6 . A method for cutting a stone, said method comprising: 
 forming a pavilion portion having a culet;    forming a crown portion having a table with a predetermined number of sides;    forming a girdle separating said pavilion portion and said crown portion; and    forming at least three lower girdle facets between pairs of pavilion main facets, each of said at least three lower girdle facets having a top side along said girdle, wherein only two of the at least three lower girdle facets have a common lower vertex extending towards said culet; and    forming at least three upper girdle facets for each side of said table, each of said at least three upper girdle facets having a bottom side along said girdle, wherein said at least three upper girdle facets have a common upper vertex extending toward said table.    
   
   
       7 . A method for cutting a stone, said method comprising: 
 forming a crown portion having a table;    forming a pavilion portion having a culet;    forming a girdle separating said crown portion from said pavilion portion;    forming a plurality of bezel facets extending between said girdle and said table;    forming a plurality of pavilion main facets extending between said culet and said girdle;    forming at least three upper girdle facets between adjacent bezel facets, said at least three upper girdle facets having a common upper vertex extending towards said table, wherein each of said at least three upper girdle facets has a bottom side along said girdle; and    forming at least three lower girdle facets between adjacent pavilion main facets, each of said at least three lower girdle facets having a top side along said girdle, wherein only two of said at least three lower girdle facets have a common lower vertex extending towards said culet and a third lower girdle facet of the at least three lower girdle facets having a separate lower vertex extending toward said culet.    
   
   
       8 . The method of  claim 7 , further comprising: 
 forming said table on said crown with a plurality of sides;    forming a star facet extending from each side of said table;    forming bezel facets between said star facets, said bezel facets each extending from a lower vertex at said girdle to an upper vertex at said table.    
   
   
       9 . A method for cutting a stone, said method comprising: 
 forming a crown portion;    forming a pavilion portion including a culet;    forming a girdle separating said crown portion from said pavilion portion; and    forming a lower girdle facet on said pavilion portion rotated not to be tangent to a general circumference of said stone.    
   
   
       10 . The method of  claim 9 , further comprising forming multiple lower girdle facets on said pavilion portion rotated to not be tangent to the general circumference of said stone.