D-Qtz-Round: Faceting Design Diagram

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