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


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

Hex Burst (B25.JRG)
By Jeff R. Graham
Copyright 2001
82.7% Light Return
Angles for R.I. = 1.62
65 facets + 6 facets on girdle = 71
2-fold, mirror-image symmetry
96 index
L/W = 1.332 T/W = 0.722 T/L = 0.542
P/W = 0.564 C/W = 0.191
H/W = (P+C)/W+0.02 = 0.774
P/H = 0.728 C/H = 0.246
Vol./W^3 = 0.408

Addition # 5 – This is really a “Money Cut” design, notice the lack of meets and the high degree of flexibility. It is ideal for large Topaz’s that you do not want to spend a lot of time on, but that need a Barion. Cut this in R.I. 1.62 to 1.93 (86.3%) 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.