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.
Mixed Up 2.5 to 1
By: Dan Starr
Cutting Instructions
Mixed Up 2.5 to 1 cut in intense vivid lemon yellow heliodore
17.50 ct  - 25.2 mm x 10.7 mm 8.7 mm
Mixed Up 2.5 to 1 - Designed by Dan Starr © 2015
Angles are for R.I = 1.58
33 Facets  +  8 Girdle Facets  =  41  Total Facets
2-fold mirror-image symmetry
96  Index
L/W = 2.50  T/W = 1.651  U/W = 0.350  P/W = 0.557  C/W = 0.254
Volume/W e3  =  1.134
Cutting Remarks  -  The P7 and P8 facets give a lot of sparkle at the end of this fairly long design.  Nick and polish the corners
at P9(G) at your discretion to help prevent chipping at the high stress corners. This design works for RI = 1.58 to RI = 2.15 with
no changes.
Pavilion
P1(G)
90.00°
24-72                                                                   
Along with P2(G), make a 2.5 to 1 preform.                                                
P2(G)
90.00°
96-48                                                                   
Along with P1(G), make a 2.5 to 1 preform.                                                 
P3
58.93°
96-48                                                                  
Cut to center keel and form the girdle.                                                           
P4
42.78°
96-48                                                                  
Cut a step.                                                                                                     
P5
39.80°
96-48                                                                   
Cut an equal step and form a final keel.                                                         
P6
46.79°
24-72                                                                   
Cut to finish the girdle.                                                                                  
P7
41.79°
23-25-71-73                                                        
Cut to meet the corner at P3 and P4.                                                             
P8
39.50°
24-72                                                                   
Cut to meet P6.                                                                                            
Crown
C1
42.90°
96-48                                                                  
Cut to establish the girdle.                                                                            
C2
45.00°
24-72                                                                   
Cut to meet C1 and establish the girdle.                                                       
C3
32.00°
01-47-49-95                                                        
Cut to meet the girdle at the corners.                                                            
C4
27.60°
02-46-50-94                                                        
Cut to meet the girdle at the corners.                                                              
C5
39.00°
23-25-71-73                                                        
Cut to meet the girdle at the corners.                                                             
C6
22.00°
24-72                                                                   
Cut to meet C2.                                                                                              
P9(G)
90.00°
12-36-60-84                                                        
Nick and polish the corners to help prevent chipping. (Optional)               
T
0.00°
Table                                                                  
Cut to meet C3 and C4.                                                                                 
Cutting Instructions
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