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Easy Chevron 2.0
By: Dan Starr
Cutting Instructions
Easy Chevron 2.0 cut in Pale Aquamarine
4.30 ct  - 13.9 mm x 6.9 mm 5.7 mm
Brightness Table
R.I.
Iso %
Cos %
1.58
88.8
81.0
1.62
87.0
79.3
1.76
87.1
77.9
1.96
83.9
73.4
2.17
81.6
68.9
Easy Chevron 2.0 - Designed by Dan Starr © 2007
Angles are for R.I = 1.58
29 Facets  +  8 Girdle Facets  =  37  Total Facets
2-fold mirror-image symmetry
96  Index
L/W = 2.00  T/W = 0.826  U/W = 0.388  P/W = 0.501  C/W = 0.251
Volume/W e3  =  0.818
Cutting Remarks  -  It's ok if the L/W is a little bit off.  You can compensate using C4.  This design is good as is for R.I.=1.58
to R.I.=2.17.
Pavilion for Zircon
P1
59.50°
96-48                                                                  
Cut to center point.                                                                                      
P2(G)
90.00°
96-48                                                                   
Cut to meet P1 and form the girdle.                                                              
P3
43.43°
96-48                                                                  
Cut a step so that P1, P3, and P4 are of equal width.                                  
P4
40.43°
96-48                                                                  
Cut an equal step.                                                                                         
P5(G)
90.00°
24-72                                                                   
Cut to form girdle and L/W of 2.0.                                                               
P6
47.43°
24-72                                                                   
Cut to meet girdle.                                                                                        
P7
42.43°
23-25-71-73                                                        
Cut to meet P1.                                                                                            
P8
40.13°
24-72                                                                   
Cut to meet P6.                                                                                            
P9(G)
90.00°
12-36-60-84                                                        
Cut this after C5 is cut. It minimizes stress chipping at the corners.          
Crown for Zircon
C1
42.00°
96-48                                                                  
Cut to establish the girdle.                                                                            
C2
37.90°
24-72                                                                   
Cut to meet C1 and establish the girdle.                                                       
C3
33.23°
01-47-49-95                                                        
Cut to meet the girdle at the corners.                                                            
C4
27.45°
02-46-50-94                                                        
Cut to form a chevron with the apex about 1/3 of the stone width.             
C5
17.04°
24-72                                                                   
Cut to meet C3.                                                                                            
T
0.00°
Table                                                                  
Cut to meet C3.                                                                                            
Pavilion
P1
58.30°
96-48                                                                  
Cut to center point.                                                                                      
P2(G)
90.00°
96-48                                                                   
Cut to meet P1 and form the girdle.                                                              
P3
42.07°
96-48                                                                  
Cut a step so that P1, P3, and P4 are of equal width.                                  
P4
39.10°
96-48                                                                  
Cut an equal step.                                                                                         
P5(G)
90.00°
24-72                                                                   
Cut to form girdle and L/W of 2.0.                                                               
P6
46.07°
24-72                                                                   
Cut to meet girdle.                                                                                        
P7
41.08°
23-25-71-73                                                        
Cut to meet P1.                                                                                            
P8
38.80°
24-72                                                                   
Cut to meet P6.                                                                                            
P9(G)
90.00°
12-36-60-84                                                        
Cut this after C5 is cut. It minimizes stress chipping at the corners.          
Crown
C1
42.90°
96-48                                                                  
Cut to establish the girdle.                                                                            
C2
38.78°
24-72                                                                   
Cut to meet C1 and establish the girdle.                                                       
C3
34.07°
01-47-49-95                                                        
Cut to meet the girdle at the corners.                                                            
C4
28.20°
02-46-50-94                                                        
Cut to form a chevron with the apex about 1/3 of the stone width.             
C5
17.55°
24-72                                                                   
Cut to meet C3.                                                                                            
T
0.00°
Table                                                                  
Cut to meet C3.                                                                                            
Easy Chevron 2.0 Zircon - Designed by Dan Starr © 2007
Angles are for R.I = 1.96
29 Facets  +  8 Girdle Facets  =  37  Total Facets
2-fold mirror-image symmetry
96  Index
L/W = 2.00  T/W = 0.826  U/W = 0.388  P/W = 0.526  C/W = 0.243
Volume/W e3  =  0.832
This set of angles is optimized for Zircon. The brightness for Zircon with
these angles is ISO-85.7% and COS-75.5% with a goodly amount of fire.
Cutting Instructions
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Cutting Remarks  -  It's ok if the L/W is a little bit off.  You can compensate using C4.  These numbers are specific to zircon.
Home       Finished Gemstones         Sold Gemstones        Facet Rough        My Designs        Testimonials        Clarity System        Links        How To Order