Faceting Design Diagram: Flame’n – Tourmaline, Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite

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

Jeff Graham Facet Design Jeff Graham Facet Design

Flame’n (MIR65.JRG)
By Jeff R. Graham
Copyright 2005
87.5% Light Return
Angles for R.I. = 1.62
57 facets + 4 facets on girdle = 61
8-fold symmetry
96 index
L/W = 1.000 T/W = 0.262 T/L = 0.262 P/W = 0.405
C/W = 0.225 H/W = (P+C)/W+0.02 = 0.650 P/H = 0.623 C/H = 0.346 Vol./W^3 = 0.286

Addition # 10 – Cut this in refractive indexes 1.62 to 2.14 with no changes. This is not easy to cut. Cutting the crown to center point to make the facets even helps. Note: C3 only meets C2 at 96-24-48-72. Cut the rest of the tier as evenly as possible.

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.