Enhanced diamond and method for making same

Abstract

The present invention is directed to a brilliant diamond comprised a crown portion having a table facet, a plurality of upper main facets, star facets, and upper girdle facets. The upper girdle facets form upper girdle intersecting sides and upper main facet intersecting sides. A pavilion portion has a plurality of lower main facets and lower girdle facets, which are formed in a substantially aligned arrangement with the upper girdle facets. The lower girdle facets including a lower girdle intersecting side and a lower main facet intersecting side. A girdle surface is located in between the crown and the pavilion portions, where the profile of the girdle surface includes a wide portion at areas of intersection with the upper main facet intersecting sides and a narrow portion at areas of intersection with the upper girdle facet intersecting sides.

I claim:  
     
         1 . A brilliant diamond comprising: 
 a crown portion having a table facet, a plurality of upper main facets, star facets, and upper girdle facets, said upper girdle facets forming upper girdle intersecting sides and upper main facet intersecting sides;    a pavilion portion having a plurality of lower main facets and lower girdle facets, which are formed in a substantially aligned arrangement with said upper girdle facets, said lower girdle facets including a lower girdle intersecting side and a lower main facet intersecting side; and    a girdle surface in between said crown and said pavilion portions, wherein the profile of the girdle surface includes a wide portion at areas of intersection with said upper main facet intersecting sides and a narrow portion at areas of intersection with said upper girdle facet intersecting sides.    
     
     
         2 . The invention in accordance with  claim 1 , wherein the profile of the girdle surface includes a wide portion at areas of intersection with said lower main facet intersecting sides and a narrow portion at areas of intersection with said lower girdle facet intersecting sides.  
     
     
         3 . The invention in accordance with  claim 2 , wherein the ratio of the narrow portion of the girdle surface to the wide portion is such that when viewed from the direction of said table facet, the diamond exhibits a plurality of concentric circles with alternating bright and dark reflections.  
     
     
         4 . The invention in accordance with  claim 2 , wherein the ratio of the narrow portion of the girdle surface to the wide portion of the girdle surface is such that when viewed from the direction of said table facet the diamond exhibits a plurality of table reflections forming concentric circles.  
     
     
         5 . The invention in accordance with  claim 4  wherein the ratio of said narrow portions of said girdle surface to said wider portions of said girdle surface falls within a range of about 2:3 and less.  
     
     
         6 . The invention in accordance with  claim 4  wherein the ratio of said narrow portions of said girdle surface to said wider portions of said girdle surface is 1:2.  
     
     
         7 . The invention in accordance with  claim 4  wherein said pavilion portion has a pavilion depth of about 43% and a pavilion angle of about 41°.  
     
     
         8 . The invention in accordance with  claim 7 , wherein said table facet has a diameter falling within a range of 55% to 61%.  
     
     
         9 . The invention in accordance with  claim 8  wherein said crown portion has an angle falling within a range of 33.5° to 35°.  
     
     
         10 . The invention in accordance with  claim 9 , wherein said crown portion has a crown height of about 13.5% to 14.6%.  
     
     
         11 . The invention in accordance with  claim 4  wherein the height of each lower girdle facet extends long enough so as to become adjacent to a primary table reflection among said table reflections.  
     
     
         12 . The invention in accordance with  claim 4 , wherein the height of each lower girdle facet extends long enough so as to overlap a primary table reflection among said table reflections.