Faceting Design Diagram: Sun Boon – Feldspar – Bytonite, Labradorite, Spectrolite, Orthoclase


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

Sun Boon Jeff Graham Facet Design

Sun Boon Jeff Graham Facet Design

Sun Boon (SUN40.JRG)
By Jeff R. Graham
Copyright 2006
83.5% Light Return
Angles for R.I. = 1.54
21 facets + 8 facets on girdle = 29
2-fold, mirror-image symmetry
96 index
L/W = 1.500 T/W = 1.282 T/L = 0.855 P/W = 0.450
C/W = 0.129 H/W = (P+C)/W+0.02 = 0.599 P/H = 0.752 C/H = 0.215 Vol./W^3 = 0.380

Addition # 11 – Cut in refractive indexes 1.54 to 2.14 with no changes. This is designed for thin multi-colored rough and works best in medium to darker saturation. Note: The corners float in and are just cut to look like the diagram, they can vary a little.

Sun Boon 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.