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.
Yen
By: Dan Starr
Cutting Instructions
Yen cut in Pale Ametrine
14.77 ct  - 13.6 mm  x 11.2 mm deep
Yen - Designed by Dan Starr © 2007
Angles are for R.I = 1.54
49 Facets  +  4 Girdle Facets  =  53  Total Facets
4-fold mirror-image symmetry
120 Index
L/W = 1.000  T/W = 0.394  U/W = 0.394  P/W = 0.621  C/W = 0.191
Volume/W e3  =  0.404
Cutting Remarks  -  A mirage design designed for a matched pair of ametrine squares. This design has higher and higher
performance as you increase the refractive index. It will serve as a great design to increase the color saturation
in pale stones.  Good as is from RI = 1.54 to RI = 2.14 with no changes.
Pavilion
P1
41.30°
120-015-030-045-060-075-090-105                
Cut to centerpoint.                                                                                    
P2(G)
90.00°
120-030-060-090                                             
Cut to form a square                                                                                   
P3
75.00°
120-030-060-090                                             
   Cut to meet corners and P1                                                                           
Crown
C1
40.00°
120-030-060-090                                            
Cut to establish the girdle.                                                                          
C2
34.05°
002-028-032-058-062-088-092-118               
Cut to meet the corners at C1                                                                    
C3
33.07°
  001-029-031-059-061-089-091-119                 
Cut to meet C2 at about 15% from the corners.                                        
C4
28.18°
  002-028-032-058-062-088-092-118                 
Cut to form a thin chevron at C2.                                                              
C5
23.26°
120-030-060-090                                             
Cut to meet the peaks of the chevrons.                                                    
C6
20.00°
015-045-075-105                                           
Cut to meet C2.                                                                                         
T
0.00°
Table                                                                  
Cut to just short of the C5, C6 meet points.                                             
Cutting Instructions
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Yen tilt brightness for Quartz
Yen tilt brightness for cubic zirconia