I attempt to accurately represent and describe cut stones and rough
as to appearance, size, origin and fully disclose any known
treatments in its description. Because you view the images on a
different monitor with different settings, color is particularly fickle
to represent, but I do my best.
Hammers
By: Dan Starr
Cutting Instructions
Hammers cut in Uruguayan Amethyst
2.56 ct - 8.5 mm x 5.7 mm
Brightness Table
R.I.
Iso %
Cos %
1.54
93.0
85.4
1.62
92.7
84.2
1.76
87.9
76.4
1.96
83.8
70.5
2.17
N/A
N/A
Hammers - Designed by Dan Starr © 2007
Angles are for R.I = 1.54
45 Facets  +  8 Girdle Facets  =  53  Total Facets
4-fold, mirror-image symmetry
96 Index
L/W = 1.000  T/W = 0.425  U/W = 0.425  P/W = 0.442  C/W = 0.194
Volume/W e3  =  0.261
Cutting Remarks  -  This was meant to be an easy design to cut. There are no table meet points until you polish in C7.
Pavilion
P1
41.50°
96-24-48-72                                                       
Cut to center point.                                                                                      
P2(G)
90.00°
96-24-48-72                                                       
Cut to establish the square.                                                                          
P3(G)
90.00°
12-36-60-84                                                       
Cut to about 15% of the width.                                                                   
P4
44.00°
12-36-60-84                                                       
Cut to meet P1 and P2(G).                                                                          
Crown
C1
37.00°
96-24-48-72                                                       
Cut to establish the girdle.                                                                            
C2
32.00°
12-36-60-84                                                        
Cut to meet C1 and finish the girdle.                                                            
C3
33.00°
01-23-25-47-49-71-73-95                                  
Cut to meet the girdle.                                                                                   
C4
24.40°
12-36-60-84                                                        
Cut a step approximately the same as in the picture.                                   
C5
30.00°
02-22-26-46-50-70-74-94                                  
Cut to meet C2, C3, and C4.                                                                        
C6
31.00°
96-24-48-72                                                       
Cut to meet C1. This cuts very fast!                                                           
T
0.00°
Table                                                                   
Cut well into C6 and polish before C7.                                                        
C7
14.00°
12-36-60-84                                                        
Cut to meet C6 & Table.                                                                              
Cutting Instructions
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