Faceting Design Diagram: Pat’s Points – Tourmaline – Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite


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

Pat’s Points (MC16.JRG)
By Jeff R. Graham Cut by Steve Ewens
Copyright 1999
75.9% Light Return
Angles for R.I. = 1.62
35 facets + 7 facets on girdle = 42
1-fold, mirror-image symmetry
96 index
L/W = 1.330 T/W = 0.844 T/L = 0.635
P/W = 0.614 C/W = 0.172
H/W = (P+C)/W+0.02 = 0.805
P/H = 0.762 C/H = 0.213
Vol./W^3 = 0.416

Addition # 4 – This is designed to be used in sets, it cuts pretty easy and has a nice flash. It works well around a square or trillion. Cut in about any material, I prefer medium color, 1/2ct and up. This works in Topaz… Cut this in R.I. 1.62 to 2.14 without 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.