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


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

Tesla (CHECK54.JRG)
By Jeff R. Graham
Copyright 2003
89.8% Light Return
Angles for R.I. = 1.54
67 facets + 18 facets on girdle = 85
2-fold, mirror-image symmetry
96 index
L/W = 1.325 T/W = 0.353 T/L = 0.266
P/W = 0.556 C/W = 0.231
H/W = (P+C)/W+0.02 = 0.807
P/H = 0.689 C/H = 0.286
Vol./W^3 = 0.373

Addition # 8 – This can be a little tough to cut, but not too hard. It works in refractive indexes 1.54 to 1.93 with no changes. This works well in medium to dark material, I like it in Garnets. A L/W=1.325 preform is a good idea.

 


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.