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


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

Quick Square (B14.JRG)
By Jeff R. Graham
Copyright 1999
88.3% Light Return
Angles for R.I. = 1.62
61 facets + 12 facets on girdle = 73
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.562 T/L = 0.562
P/W = 0.523 C/W = 0.199
H/W = (P+C)/W+0.02 = 0.743
P/H = 0.705 C/H = 0.268
Vol./W^3 = 0.341

Addition # 5 – This works particularly well for medium colored materials. It is very fast to cut and does not have a lot of facets. This is really another “Money Cut”. I use it a lot, when I want a cushion square that will deepen color a bit. This works well in R.I. 1.62 to 1.76 (89.9%) 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.