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as to appearance, size, origin and fully disclose any known
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Chevron Square
By: Dan Starr
Cutting Instructions
Chevron Square cut in Green/Blue Tourmaline
2.03 ct  - 7.4 mm x  5.3 mm
Brightness Table
R.I.
Iso %
Cos %
1.54
93.2
88.3
1.62
92.8
86.8
1.76
91.9
83.5
1.96
89.8
77.3
2.17
80.9
66.2
Chevron Square - Designed by Dan Starr © 2007
Angles are for R.I = 1.62
69 Facets  +  16 Girdle Facets  =  85  Total Facets
4-fold radial symmetry
96  Index
L/W = 1.000  T/W = 0.377  U/W = 0.377  P/W = 0.498  C/W = 0.171
Volume/W e3  =  0.272
Cutting Instructions
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Pavilion
P1
40.70°
06-09-12-15-18-30-33-36-39-42                         
54-57-60-63-66-78-81-84-87-90                         
Cut to center point.                                                                                            
P2(G)
90.00°
12-36-60-84                                                         
Cut to meet P1.                                                                                                  
P3(G)
90.00°
07-17-31-41-55-65-79-89                                   
Cut to meet P2(G).                                                                                             
P4(G)
90.00°
96-24-48-72                                                         
Cut to meet P3(G).                                                                                             
P5
42.00°
07-17-31-41-55-65-79-89                                   
Cut to meet P2(G).                                                                                             
P6
68.00°
96-24-48-72                                                         
Cut to meet P3(G).                                                                                             
Crown
C1
35.00°
96-24-48-72                                                         
Cut to form girdle.                                                                                              
C2
35.00°
07-17-31-41-55-65-79-89                                   
Cut to meet C1 and form girdle.                                                                         
C3
33.50°
12-36-60-84                                                         
Cut to meet C2 and form the girdle.                                                                   
C4
29.00°
01-23-25-47-49-71-73-95                                   
Cut to meet the girdle.                                                                                        
C5
24.80°
02-22-26-46-50-70-74-94                                   
Cut to meet C2.                                                                                                  
C6
11.00°
12-36-60-84                                                         
Cut a step with width equal to C4 facets.                                                          
T

Table                                                                     
Cut to meet C5, C6.                                                                                           
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Cutting Remarks - You must cut P2(G), P3(G) and P4(G) before P5 and P6.  Good unchanged from quartz to high zircon.