Faceting Design Diagram: D-Qtz-Round – Quartz – Citrine, Amethyst, Ametrine, Smokey, Rose


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

D-Qtz-Round (QTZ9.JRG)
By Jeff R. Graham
Copyright 1993
72.6% Light Return
Angles for R.I. = 1.54
97 facets + 16 facets on girdle = 113
8-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.461 T/L = 0.461
P/W = 0.549 C/W = 0.228
H/W = (P+C)/W+0.02 = 0.797
P/H = 0.689 C/H = 0.286
Vol./W^3 = 0.316

Addition # 1 – This design is very deep, cutting a preform(see heading for Sizes)is the best way, less waste. It will help darken very light material. Cut in refractive indexes 1.54 to 1.93 (86%) with no changes. It can be cut to center point if you don’t mind the waste, 1-12cts.


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.