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


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

Liner (B3.JRG)
By Jeff R. Graham
Copyright 2001
88.8% Light Return
Angles for R.I. = 1.62
41 facets + 8 facets on girdle = 49
2-fold, mirror-image symmetry
96 index
L/W = 1.330 T/W = 0.961 T/L = 0.722
P/W = 0.572 C/W = 0.160
H/W = (P+C)/W+0.02 = 0.752
P/H = 0.760 C/H = 0.213
Vol./W^3 = 0.402

Addition # 5 – This is a “Money Cut”… It’s fast to cut with a low number of facets and high performance. This can be cut in R.I. 1.62 to 1.93 with no changes.


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.