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


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

Micro Jeff Graham Facet Design

Micro Jeff Graham Facet Design

Micro (SUN7.JRG)
By Jeff R. Graham
Copyright 2006
86.3% Light Return
Angles for R.I. = 1.54
49 facets + 16 facets on girdle = 65
8-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.757 T/L = 0.757 P/W = 0.457
C/W = 0.118 H/W = (P+C)/W+0.02 = 0.595 P/H = 0.768 C/H = 0.198 Vol./W^3 = 0.212

Addition # 11 – I know… it looks too simple. Try it. This design is very bright and looks like the face of a flashlight when cut. This is made to be bright, show color and use shallow rough. It works well in colored material and is okay in very light shiller.

Micro 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.