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


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

Sun Flash Jeff Graham Facet Design

Sun Flash Jeff Graham Facet Design

Sun Flash (SUN41.JRG)
By Jeff R. Graham
Copyright 2006
83.9% Light Return
Angles for R.I. = 1.54
11 facets + 4 facets on girdle = 15
2-fold symmetry
96 index
L/W = 3.000 T/W = 2.833 T/L = 0.944 P/W = 0.450
C/W = 0.206 H/W = (P+C)/W+0.02 = 0.676 P/H = 0.665 C/H = 0.305 Vol./W^3 = 1.271

Addition # 11 – Cut in refractive indexes 1.54 to 2.14 with no changes. This is designed for color/shiller and as the name implies, it’s basically for flash. Orientate the flash so it shows in the table. L/W is not critical.

Sun Flash 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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