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


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

Simple Glitter Jeff Graham Facet Design Simple Glitter Jeff Graham Facet Design

Simple Glitter (MC91.GEM)
By Jeff R. Graham
Copyright 2003
81.1% Light Return
Angles for R.I. = 1.62
113 facets + 16 facets on girdle = 129
8-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.350 T/L = 0.350 P/W = 0.431
C/W = 0.206 H/W = (P+C)/W+0.02 = 0.657 P/H = 0.656 C/H = 0.314 Vol./W^3 = 0.213

Addition # 12 – This is pretty neat. The outside facets frame the center facets which are quite sparkly. The P1,C1 tiers can vary in width, just cut C2,P3 in or out. Note: On the crown changing C1 will affect the table. Cut in refractive indexes 1.62 to 2.14 (84.4) with no changes. Hint: I try to make the table a little larger than the P4 tier so it shows like a star through the table.

Simple 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.