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


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

Infusion Jeff Graham Facet Design

Infusion Jeff Graham Facet Design

Infusion (SUN13.JRG)
By Jeff R. Graham
Copyright 2006
88.9% Light Return
Angles for R.I. = 1.54
37 facets + 8 facets on girdle = 45
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.205 T/L = 0.205 P/W = 0.466
C/W = 0.162 H/W = (P+C)/W+0.02 = 0.648 P/H = 0.719 C/H = 0.250 Vol./W^3 = 0.261

Addition # 11 – Cut in refractive indexes 1.54 to 2.14 with no changes. Note: The corners float and can be adjusted. Cut them as close to the diagram as you can for the square checkers. This is good for thinner and moderate colored material

Infusion 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.