Gemstone cut

Abstract

A new method of cutting a gemstone known as the “Riemer” cut is provided. The gemstone has a crown portion, a pavilion portion characterized by having four main pavilion facets and a culet base and girdle portion provided between the crown portion and pavilion portion. The main pavilion facets are integrally formed with the culet base thereby creating a pavilion facet base. The “Riemer” cut is applicable to all shapes of stones including round, square, oval, marquise, pear-shaped and rectangular diamonds.

1 - 48 . (canceled)  
   
   
       49 . A gemstone comprising: 
 a crown portion;    a pavilion portion characterized by comprising four main pavilion facets and a culet base; and    a girdle portion provided between the crown portion and pavilion portion;    wherein said main pavilion facets are integrally formed with the culet base thereby creating a pavilion facet base.    
   
   
       50 . The gemstone according to  claim 49 , wherein said completed gemstone is configured to comprise 66-77% of the material of the rough stone from which it is formed.  
   
   
       51 . The gemstone according to  claim 49 , further comprising: 
 a plurality of lower pavilion facets, each lower pavilion facet abutting a corresponding main pavilion facet at a one end thereof; and    wherein each lower pavilion facet has one of a group of shapes including a substantially triangular and a substantially trapezoidal shape.    
   
   
       52 . The gemstone according to  claim 49 , further comprising: 
 a plurality of lower girdle facets.    
   
   
       53 . The gemstone according to  claim 52 , further comprising: 
 a plurality of half facets abutting each of the corresponding lower girdle facets; and    wherein each of said half facet has one of a group of shapes including a substantially triangular shape.    
   
   
       54 . The gemstone according to  claim 49 , wherein said gemstone is a round stone and wherein the crown portion comprises a plurality of (16) upper girdle facets, a plurality of (8) star facets, a plurality of (8) bezel facets and a table facet.  
   
   
       55 . The gemstone according to  claim 49 , wherein said gemstone is any of group including a precious gemstone and a semi-precious gemstone.  
   
   
       56 . The gemstone according to  claim 55 , wherein said precious gemstone is a diamond.  
   
   
       57 . The gemstone according to  claim 57 , wherein said diamond has a generally round shape having a design comprising one of a group including symmetrical and asymmetrical designs.  
   
   
       58 . The gemstone according to  claim 49 , further comprising: 
 four central star pavilion facets extending from the culet to the girdle; and    a plurality of pavilion side facets on the sides of each central star pavilion facet.    
   
   
       59 . The gemstone according to  claim 58 , wherein the planar face of each of said central star pavilion facets forms an angle of 22½ degrees relative to the planar face of each of said corresponding main pavilion facets.  
   
   
       60 . The gemstone according to  claim 58 , wherein said gemstone is a round stone and wherein the crown portion comprises a plurality of facets comprising one of a group including star crown and side facets.  
   
   
       61 . The gemstone according to  claim 60 , wherein said side facets comprises comprising one of a group including substantially rhomboidal facets and substantially triangular star facets.  
   
   
       62 . The gemstone according to  claim 58 , wherein said gemstone is a round stone and wherein the crown portion comprises a plurality of crown facets, each having a first edge and a plurality of crown facets, each having a second edge, wherein said first edge is adjacent said second edge.  
   
   
       63 . The gemstone according to  claim 62 , wherein said first edge and said second edge are substantially equal in length.  
   
   
       64 . The gemstone according to  claim 57 , wherein said diamond is a one of a group of stones including a square stone, a rectangular stone, said diamond having a generally princess cut and wherein the corners of said square stone have a generally curved shape.  
   
   
       65 . The gemstone according to  claim 57 , wherein said diamond is a rectangular stone having a cut comprising one of a group including a generally radian cut and a generally emerald cut, wherein the corners of said diamond have a generally curved shape.  
   
   
       66 . The gemstone according to  claim 57 , wherein said diamond is an oval stone comprising a pavilion having one of a group of cuts including a generally radian cut and a generally princess cut, wherein said pavilion further comprises a plurality of secondary star facets.  
   
   
       67 . The gemstone according to  claim 57 , wherein said diamond comprises one of a group of stones including an oval stone and a pear shaped stone, said diamond comprising: 
 a crown portion having a generally princess cut;    a pavilion portion having one of a group of cuts including a generally radian cut and a generally princess cut; and    wherein said pavilion portion further comprises a plurality of secondary star facets.    
   
   
       68 . The gemstone according to  claim 67 , further comprising a plurality of half star facets.  
   
   
       69 . The gemstone according to  claim 67 , wherein said pear shaped stone has a generally round or square base whose corners have a generally curved shape.  
   
   
       70 . The gemstone according to  claim 57 , wherein said diamond is a marquise stone comprising: 
 a pavilion portion having a generally radian cut comprising four edges, four main pavilion facets and a cutlet base; and    wherein each of said four edges has an angle greater than 60°.    
   
   
       71 . The gemstone according to  claim 70 , further comprising a plurality of secondary star or half star facets.  
   
   
       72 . A medallion comprising: 
 a first element; and    at least one gemstone attached to said first element,    wherein said at least one gemstone comprises:    a crown portion;    a pavilion portion characterized by comprising four main pavilion facets and a culet base; and    a girdle portion provided between the crown portion and pavilion portion;    wherein said main pavilion facets are integrally formed with the culet base thereby creating a pavilion facet base.    
   
   
       73 . A medallion comprising: 
 a first element; and    a plurality of gemstones attached to said first element,    wherein at least one of said plurality of gemstones has a first shape and at least one of said plurality of gemstones has a second shape, said first shape being different from said second shape.    
   
   
       74 . The gemstone according to  claim 73 , wherein at least one of said plurality of gemstones comprises: 
 a crown portion;    a pavilion portion characterized by comprising four main pavilion facets and a culet base; and    a girdle portion provided between the crown portion and pavilion portion;    wherein said main pavilion facets are integrally formed with the culet base thereby creating a pavilion facet base.    
   
   
       75 . The gemstone according to  claim 49 , wherein said gemstone comprises one of a group including a round diamond and a square diamond, wherein said gemstones further comprises four secondary pavilion facets integrally formed with the culet base.  
   
   
       76 . The gemstone according to  claim 75 , wherein said diamond is a square stone comprising a pavilion portion having generally princess cut.  
   
   
       77 . The gemstone according to  claim 49 , further comprising a plurality of shaped facets integrally formed on the main pavilion facets, said shaped facets comprising one of group including pairs of heart-shaped facets and arrow-shaped facets.  
   
   
       78 . A method for cutting a gemstone comprising the steps of: 
 a first cutting of the pavilion portion of the gemstone thereby creating a fan having four edges cut symmetrically in pairs about each ridge;    a first cutting of the crown portion of the gemstone in stages thereby creating a crown having a plurality of upper girdle facets, a plurality of star facets, a plurality of bezel facets and a table facet;    providing a girdle portion between the crown portion and pavilion portion;    a second cutting of the crown portion of the gemstone to create a plurality of secondary star facets, each secondary star facet shaped as a pyramid whose base has common face with the corresponding star facet; and    a second cutting of the pavilion portion to provide four main pavilion facets integrally formed with a culet base thereby creating a pavilion facet base.    
   
   
       79 . The method according to  claim 78 , further comprising the step of: 
 providing a plurality of lower girdle facets adjacent said four main pavilion facets.    
   
   
       80 . A method for cutting a gemstone comprising the steps of: 
 a first cutting of the pavilion portion of the gemstone thereby creating a fan having four edges cut symmetrically in pairs about each ridge;    a second cutting of the pavilion portion of the gemstone to provide four main pavilion facets integrally formed with a culet base thereby creating a pavilion facet base;    providing a plurality of facets forming a crown portion;    providing a girdle portion between the crown portion and pavilion portion; and    a third cutting of the pavilion portion of the gemstone to provide four extra pavilion facets integrally formed with the culet base.