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


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

Boxed Glitter Jeff Graham Facet Design

Boxed Glitter Jeff Graham Facet Design

Boxed Glitter (MC93.JRG)
By Jeff R. Graham
Copyright 2006
83.4% Light Return
Angles for R.I. = 1.62
153 facets + 20 facets on girdle = 173
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.527 T/L = 0.527 P/W = 0.544
C/W = 0.187 H/W = (P+C)/W+0.02 = 0.751 P/H = 0.724 C/H = 0.249
Vol./W^3 = 0.342

Addition # 12 – This is great for lightly saturated materials. Cut in refractive indexes 1.62 to 2.14 (87.9%) with no changes.

Boxed Glitter Jeff Graham Facet Design

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.