Abstract:
The instant application discloses, among other things, a specific set of cutting proportions tailored for the optical characteristics of Silicon Carbide (“SiC”) Asscher cut gemstone.

Description:
FIELD 
       [0001]    This disclosure relates to a way to produce a Silicon Carbide Asscher Cut gemstone. 
       BACKGROUND 
       [0002]    Generally, facets on precious and semi-precious gemstones are cut so as to provide brilliance to these gemstones in an economical manner. Gemstones may also be cut to provide reflections with patterns visible. 
       SUMMARY OF THE INVENTION 
       [0003]    The instant application discloses, among other things, a specific set of cutting proportions tailored for the optical characteristics of Silicon Carbide (“SiC”) Princess cut gemstone. 
         [0004]    Silicon Carbide (SiC) is a compound of silicon and carbon. It exists in a number of crystalline forms, often grouped as polytypes of similar structures. Three common polytypes are 3C (β), 4H, and 6H (α). 3C (β) has a cubic crystal structure; 4H and 6H (α) each have hexagonal crystal structures. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0005]      FIG. 1  is a side view of an example of an SiC Asscher Cut gemstone. 
           [0006]      FIG. 2  is a top view of an example of an SiC Asscher Cut gemstone. 
           [0007]      FIG. 3  is a bottom view of an example of SiC Asscher Cut gemstone. 
           [0008]      FIG. 4  is an illustration of a flowchart of one way to create an SiC Asscher Cut gemstone. 
       
    
    
     DESCRIPTION OF THE INVENTION 
       [0009]      FIG. 1  is a side view of an example of an SiC Asscher cut gemstone. Crown  130  is the portion of a gem above the girdle. Girdle  130  is the outer edge of the gemstone, separating the Crown  100  and the Pavilion  110 . Girdle  130  is generally located near the area of a gemstone at the widest portion of the gemstone, where Diameter  120  indicates the edge-to-edge width of the gemstone. Table  140  is the largest facet on the gemstone. 
         [0010]      FIG. 2  is a top view (Crown side) of an example of an SiC Asscher Cut gemstone. The SiC gemstone has a four-fold symmetry. The angles for this cut may be: 
         [0000]    
       
         
               
               
               
             
           
               
                   
                   
               
               
                   
                 Facet 
                 Degrees 
               
               
                   
                   
               
             
             
               
                   
                 Crown Main Tier One Facets 210 
                 45.4 
               
               
                   
                 Crown Main Tier Two Facets 220 
                 34.3 
               
               
                   
                 Crown Main Tier Three Facets 230 
                 22.6 
               
               
                   
                 Crown Main Tier Four Facets 240 
                 18.5 
               
               
                   
                 Crown Corner Tier One Facets 250 
                 41.8 
               
               
                   
                 Crown Corner Tier Two Facets 260 
                 31.1 
               
               
                   
                 Crown Corner Tier Three Facets 270 
                 20.2 
               
               
                   
                 Crown Corner Tier Four Facets 280 
                 16.5 
               
               
                   
                   
               
             
          
         
       
     
         [0011]      FIG. 3  is a bottom view (Pavilion side) of an example of an SiC Asscher cut gemstone. The cuts may be made in several tiers. 
         [0012]    The angles for this cut may be: 
         [0000]    
       
         
               
               
               
             
           
               
                   
                   
               
               
                   
                 Facet 
                 Degrees 
               
               
                   
                   
               
             
             
               
                   
                 Pavilion Main Tier One Facets 310 
                 49.8 
               
               
                   
                 Pavilion Main Tier Two Facets 320 
                 45.1 
               
               
                   
                 Pavilion Main Tier Three Facets 330 
                 43.1 
               
               
                   
                 Pavilion Main Tier Four Facets 340 
                 37.6 
               
               
                   
                 Pavilion Corner Tier One Facets 350 
                 46.3 
               
               
                   
                 Pavilion Corner Tier Two Facets 360 
                 41.6 
               
               
                   
                 Pavilion Corner Tier Three Facets 370 
                 39.6 
               
               
                   
                 Pavilion Corner Tier Four Facets 380 
                 34.3 
               
               
                   
                   
               
             
          
         
       
     
         [0013]    One having skill in the art will recognize that slight variations in the cutting angle, up to approximately 0.2 degrees greater or smaller, may still produce a desired Asscher cut SiC gem. 
         [0014]      FIG. 4  is an illustration of a flowchart of one way to create a Asscher cut gemstone. In this example, a girdle outline is cut  400  to provide a diameter of the SiC gemstone. The pavilion facets are cut  410 , including pavilion main facets and pavilion corner facets. 
         [0015]    The pavilion facets are polished  420 , as is the girdle  430 . The stone is transferred to allow cutting and polishing of the crown side. 
         [0016]    The crown main and corner facets are cut  450 , and polished  460 . 
         [0017]    While the detailed description above has been expressed in terms of specific examples, those skilled in the art will appreciate that many other configurations could be used. Accordingly, it will be appreciated that various equivalent modifications of the above-described embodiments may be made without departing from the spirit and scope of the invention. 
         [0018]    Additionally, the illustrated operations in the description show certain events occurring in a certain order. In alternative embodiments, certain operations may be performed in a different order, modified or removed. Moreover, steps may be added to the above described logic and still conform to the described embodiments. Further, operations described herein may occur sequentially or certain operations may be processed in parallel. Yet further, operations may be performed by a single processing unit or by distributed processing units. 
         [0019]    The foregoing description of various embodiments of the invention has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed. It is intended that the scope of the invention be limited not by this detailed description, but rather by the claims appended hereto. The above specification, examples and data provide a complete description of the manufacture and use of the invention. Since many embodiments of the invention can be made without departing from the spirit and scope of the invention, the invention resides in the claims hereinafter appended.