Faceting Design Diagram: Killer – Quartz – Citrine, Amethyst, Ametrine, Smokey, Rose


Quartz (Amethyst, Citrine, Ametrine, Smokey, Rose)

Killer (CHECK45.JRG) Ametrine "Killer"
By Jeff R. Graham
Copyright 2002
84.7% Light Return
Angles for R.I. = 1.54
31 facets + 4 facets on girdle = 35
2-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.369
T/L = 0.369 P/W = 0.447
C/W = 0.197 H/W = (P+C)/W+0.02 = 0.664
P/H = 0.673 C/H = 0.297
Vol./W^3 = 0.336

Addition # 8 – This crown will take a little work, but the design is basically easy. Roughing in the table before cutting C8 helps establish the proportions. This works great in refractive indexes 1.54 to 2.14 with no changes.


Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

Gram Faceting Archive of Information
This edited version of an article by the late Jeff Graham is part of a special archived informational series from Gram Faceting. Used with permission.