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


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

Plus Cushion (CHECK16.JRG)
By Jeff R. Graham
Copyright 2001
93.1% Light Return
Angles for R.I. = 1.62
45 facets + 12 facets on girdle = 57
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.219 T/L = 0.219
P/W = 0.429 C/W = 0.157
H/W = (P+C)/W+0.02 = 0.606
P/H = 0.708 C/H = 0.259
Vol./W^3 = 0.211

Addition # 6 – No changes for refractive indexes 1.62 to 1.93… This is really a “Money Cut”, it’s fast, will cut in about any material, and is very nice. The light return on this design is very high and I tend to prefer medium colored materials in this cut.


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.