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.
Sold Gemstones :
Denise's Round Brilliant A
By: Dan Starr
Cutting Instructions
Denise's Round Brilliant A - Designed by Dan Starr © 2007
Angles are for R.I = 1.75
57 Facets  +  16 Girdle Facets  =  73  Total Facets
8-fold radial symmetry
96  Index
L/W = 1.000  T/W = 0.513  U/W = 0.513  P/W = 0.423  C/W = 0.149
Volume/W e3  =  0.206
Cutting Remarks  -  Watch out for P3...it cuts very quickly.  The crown can be tangent ratioed up to C1=45° with no
problems. These angles work without changes from R.I. of 1.62 to 2.17.
Brightness Table
R.I.
Iso %
Cos %
1.54
X
X
1.62
93.0
86.3
1.76
91.8
83.0
1.96
88.6
78.1
2.17
90.6
77.9
Denise's Round Brilliant A cut in Pyrope
2.76 ct  - 8.4 x 5.2 mm
Pavilion
P1
41.00°
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
40.20°
15-39-63-87                                                                
Cut to center point and meet P2(G).                                                             
P4
39.70°
03-27-51-75                                                               
Cut to new center point and meet P2(G).                                                      
Crown
C1
36.00°
96-06-12-18-24-30-36-42-48-54-60-66-72-78-84-90
Cut to form girdle.                                                                                          
C2
32.50°
03-15-27-39-51-63-75-87                                          
Cut to meet girdle.                                                                                          
C3
20.00°
09-21-33-45-57-69-81-93                                         
Cut to meet C1.                                                                                              
T
0°
Table                                                                          
Cut to meet C2.