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Thoth 1.25
By: Dan Starr
Cutting Instructions
Thoth 1.25 cut in Nigerian Rubellite
2.44 ct  - 7.4 mm  x 9.4 mm x 5.6 mm deep
Brightness Table
R.I.
Iso %
Cos %
1.54
87.8
81.3
1.62
89.7
82.1
1.76
89.2
80.4
1.96
90.5
77.1
2.17
85.4
68.6
Torrie - Designed by Dan Starr © 2008
Angles are for R.I = 1.62
75 Facets  +  20 Girdle Facets  =  96  Total Facets
2-fold mirror-image symmetry
120 Index
L/W = 1.247  T/W = 0.756  U/W = 0.562  P/W = 0.542  C/W = 0.191
Volume/W e3  =  0.360
Cutting Remarks  -  These angles work without changes from R.I. of 1.54 to 2.17.  Easy to cut.
Pavilion
P1
41.00°
120-006-012-018-024-030-036-042-048-054
060-066-072-078-084-090-096-102-108-114
Cut to center point.                                                                                      
P2(G)
90.00°
024-030-036-084-090-096                              
Cut to meet P1.                                                                                            
P3(G)
90.00°
014-046-074-106                                             
Cut to meet P1 and P2(G).                                                                           
P4
59.12°
014-046-074-106                                            
Cut to meet P1, P2(G), & P3(G).                                                                
P5(G)
90.00°
006-054-066-114                                            
Cut to meet P3(G) & P4.                                                                             
P6
61.92°
006-054-066-114                                            
Cut to meet P3(G), P4, & P5(G).                                                                
P7(G)
90.00°
003-057-063-117                                            
Cut to meet P5(G) & P6.                                                                             
P8
62.81°
003-057-063-117                                            
Cut to meet P5(G), P6, & P7(G).                                                                
P9(G)
90.00°
120-060                                                            
Cut to meet P7(G) & P8 and establish L/W = 1.25.                                    
P10
63.09°
120-060                                                            
Cut to meet P7(G), P8,  & P9(G).                                                               
Crown
C1
44.00°
120-060                                                               
Cut to establish the girdle.                                                                            
C2
44.00°
003-057-063-117                                               
Cut to meet C1 and establish the girdle.                                                       
C3
44.00°
006-054-066-114                                               
Cut to meet C2 and establish the girdle.                                                       
C4
44.00°
014-046-074-106                                               
Cut to meet C3 and establish the girdle.                                                       
C5
44.00°
024-036-084-096                                               
Cut to meet C4 and establish the girdle.                                                       
C6
40.66°
030-090                                                              
Cut to meet C5 & establish the girdle.                                                          
C7
41.92°
002-058-062-118                                               
Cut to meet the girdle.                                                                                  
C8
36.14°
010-050-070-110                                               
Cut to meet the girdle.                                                                                  
C9
37.69°
027-033-087-093                                                
Cut to meet the girdle.                                                                                  
C10
34.63°
030-090                                                              
Cut to meet C6.                                                                                           
C11
38.22°
120-060                                                               
Cut to meet C1.                                                                                           
T
0.00°
Table                                                                  
Cut to meet C7, C8, & C11.                                                                        
C12
27.66°
016-044-076-104                                               
Cut to meet C4/C5 and C10/T.                                                                   
Cutting Instructions
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