Op Blade: Faceting Design Diagram

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

Op Blade (QTZ66.JRG)
By Jeff R. Graham
Copyright 1998
82.1% Light Return
Angles for R.I. = 1.54
77 facets + 8 facets on girdle = 85
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.482 T/L = 0.482
P/W = 0.437 C/W = 0.150
H/W = (P+C)/W+0.02 = 0.607
P/H = 0.721 C/H = 0.247
Vol./W^3 = 0.202

Addition # 3 - This design cuts a little different than usual. It is not hard, watch the step on the crown. I like this in a large Amethyst (in darker color). Cut in about any material, 1-12cts. Cut in refractive indexes 1.54 to 2.14 (88.2%) with no changes.

Random - Cosine - ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler