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


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

Ice (CHECK49.JRG) "Ice" Amertrine
By Jeff R. Graham
Copyright 2002
80.7% Light Return
Angles for R.I. = 1.54
58 facets + 12 facets on girdle = 70
3-fold, mirror-image symmetry
96 index
L/W = 1.077 T/W = 0.157 T/L = 0.146
P/W = 0.434 C/W = 0.223
H/W = (P+C)/W+0.02 = 0.677
P/H = 0.641 C/H = 0.330
Vol./W^3 = 0.238

Addition # 8 – This cuts pretty fast and is not hard. It works best in a large stone and I actually designed it for Rose de France. Cut in refractive indexes 1.54 to 2.14 (87.9%)with no changes. P5 & P6 cut fast and can be omitted on a small stone (the table too).


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.