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


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

Samurai (MC55.JRG) Green Tourmaline
By Jeff R. Graham
Copyright 2001
87% Light Return
Angles for R.I. = 1.62
39 facets + 12 facets on girdle = 51
1-fold, mirror-image symmetry
96 index L/W = 1.126 T/W = 0.416
T/L = 0.369 P/W = 0.414 C/W = 0.190
H/W = (P+C)/W+0.02 = 0.624
P/H = 0.663 C/H = 0.305
Vol./W^3 = 0.226

Addition # 7 – This design is fun to cut and should be done in a fairly large sized stone so that the Samurai can be seen. This is a little tough… Here is an artical cutting Samurai on cutting this stone…


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.