Faceting Design Diagram: Zig – Reflector – Tourmaline – Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite

Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)

Zig – Reflector (MC24.JRG) Tourmaline cut by Tony Carson
By Jeff R. Graham
Copyright 1999
80% Light Return
Angles for R.I. = 1.62
10 facets + 4 facets on girdle = 14
2-fold symmetry
96 index
L/W = 2.000 P/W = 0.466 C/W = 0.184H/W = (P+C)/W+0.02 = 0.670
P/H = 0.696 C/H = 0.274
Vol./W^3 = 0.745

Addition # 4 -This has nice long diamond shaped flash in it. I like this in Amethyst or any nice color Quartz. There are no surprises when cutting, I usually cut this in a larger size, but it works well for small crystals too. This works in Topaz also…

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.