Cutting Instructions
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.
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Monocerotis GemBob
By: Dan Starr
Cutting Instructions
Pavilion
P1
42.00°
96-06-12-18-24-30-36-42-48-54-60-66-72-78-84-90
Cut to center point.                                                                                      
P2(G)
90.00°
96-06-12-18-24-30-36-42-48-54-60-66-72-78-84-90
Cut to meet P1.                                                                                            
P3
41.00°
09-21-33-45-57-69-81-93                                      
Cut to center point and meet P2(G).                                                           
Crown
C1
33.00°
96-48                                                                   
Cut to form girdle.                                                                                        
C2
32.25°
06-12-18-30-36-42-54-60-66-78-84-90              
Cut to meet C1 and establish the girdle.                                                       
C3
34.00°
24-72                                                                   
Cut to meet C2 and establish the girdle.                                                       
C4
27.50°
15-33-63-81                                                         
Cut to meet the girdle.                                                                                   
C5
16.10°
96-48                                                                   
Cut to meet C2.                                                                                            
C6
16.10°
24-72                                                                    
Cut to meet C2.                                                                                            
T
0°
Table                                                                    
Cut to meet C5.                                                                                             
Monocerotis - Designed by Dan Starr © 2006
Angles are for R.I = 1.54
49 Facets  +  16 Girdle Facets  =  65  Total Facets
2-fold radial symmetry
96  Index
L/W = 1.00  T/W = 0.404  U/W = 0.227  P/W = 0.443  C/W = 0.145
Volume/W e3  =  0.198
Cutting Remarks  -  This is a variation of my Monocerotis design with fewer mast and angle changes thanx to Bob Collins
(GemBob).  The light return and reflection patterns are nearly identical.  Thanx Bob!
Brightness Table
R.I.
Iso %
Cos %
1.54
94.9
90.0
1.62
94.5
88.4
1.76
93.2
84.8
1.96
89.6
79.0
2.14
88.6
75.1