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


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

Boss (CHECK73.JRG)
By Jeff R. Graham
Copyright 2003
80.8% Light Return
Angles for R.I. = 1.54
73 facets + 8 facets on girdle = 81
2-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.323 T/L = 0.323
P/W = 0.470 C/W = 0.163
H/W = (P+C)/W+0.02 = 0.653
P/H = 0.720 C/H = 0.249
Vol./W^3 = 0.243

Addition # 8 – Cut this in refractive indexes 1.54 to 2.14 (89.5%) with no changes. The crown on this is a little complicated, and I do not recommend this for a novice. The crown can be cut in another order and may take some adjusting to make all the meets depending on your faceting machine. This is really nice in higher refractive index materials like Zircon and Sapphire.


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.