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

Turbulent Times (SUN22.JRG)
By Jeff R. Graham
Copyright 2006
76.1% Light Return
Angles for R.I. = 1.54
51 facets + 10 facets on girdle = 61
5-fold, mirror-image symmetry
80 index
L/W = 1.000 T/W = 0.541 T/L = 0.541 P/W = 0.517
C/W = 0.215 H/W = (P+C)/W+0.02 = 0.752 P/H = 0.688 C/H = 0.286 Vol./W^3 = 0.285

Addition # 11 - Cut in refractive indexes 1.54 to 2.14 with no changes. This is designed for lightly saturated rough and works in any color. I like it in Beryl and light colored watermelons. This is not complicated and cuts easily. Note: The girdle can be cut in first and the P1 cut to meet so that center point is not needed and it saves rough.

 

 

 

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