Faceting Design Diagram: Omit – Feldspar – Bytonite, Labradorite, Spectrolite, Orthoclase


Sunstone (Feldspar, Bytonite, Labradorite, Spectrolite, Orthoclase)

Omit Jeff Graham Face Design

Omit Jeff Graham Face Design

Omit (SUN2.JRG)
By Jeff R. Graham
Copyright 2006
84.8% Light Return
Angles for R.I. = 1.54
29 facets + 8 facets on girdle = 37
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.621 T/L = 0.621 P/W = 0.466
C/W = 0.222 H/W = (P+C)/W+0.02 = 0.708 P/H = 0.658 C/H = 0.313 Vol./W^3 = 0.291

 

Addition # 11 – This works in refractive indexes 1.54 to 2.14 with no changes. This is designed for watermelon or multi-colored material. Note: The pavilion is a reflector which will help keep colors from mixing.

Omit Jeff Graham Face 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.