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


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

Sun Rays Jeff Graham Facet Design

Sun Rays Jeff Graham Facet Design

Sun Rays (SUN36.JRG)
By Jeff R. Graham
Copyright 2006
87.2% Light Return
Angles for R.I. = 1.54
22 facets + 10 facets on girdle = 32
2-fold, mirror-image symmetry
96 index
L/W = 2.000 P/W = 0.450 C/W = 0.196
H/W = (P+C)/W+0.02 = 0.667 P/H = 0.675 C/H = 0.295 Vol./W^3 = 0.543

Addition # 11 – Cut in refractive indexes 1.54 to 2.14 with no changes. This is for very shallow material. It will work well in about any material. Note: P3(G), P4(G) are equal in size. The crown may take a little tweaking to make center point.

Sun Rays Jeff Graham Facet Design

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

About the author
Jeff R. Graham
The late Jeff Graham was a prolific faceter, creator of many original faceting designs, and the author of several highly-regarded instructional faceting books such as Gram Faceting Designs.
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