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


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

Cool (CHECK42.JRG)
By Jeff R. Graham
Copyright 2001
83.4% Light Return
Angles for R.I. = 1.54
45 facets + 8 facets on girdle = 53
2-fold, mirror-image symmetry
120 index
L/W = 1.271 T/W = 0.379 T/L = 0.298
P/W = 0.450 C/W = 0.223
H/W = (P+C)/W+0.02 = 0.692
P/H = 0.649 C/H = 0.322
Vol./W^3 = 0.471

Addition # 6 – This one is really nice, and fairly fast to cut once you get used to the 120 index gear. I like it in about any material. Cut in refractive indexes 1.54 t0 1.93 (85.1%)with no changes. The cutting order on the crown can be a different order, leave yourself some extra room when cutting the crown, a re-cut to line things up is normal.


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.