Sunstone (Feldspar, Bytonite, Labradorite, Spectrolite, Orthoclase)
Sliver (SUN9.JRG)
By Jeff R. Graham
Copyright 2006
84.6% Light Return
Angles for R.I. = 1.54
23 facets + 6 facets on girdle = 29
2-fold, mirror-image symmetry
96 index
L/W = 1.500 T/W = 1.148 T/L = 0.765 P/W = 0.450
C/W = 0.132 H/W = (P+C)/W+0.02 = 0.602 P/H = 0.748 C/H = 0.219 Vol./W^3 = 0.284
PAVILION
CROWN
Addition # 11 – Cut in refractive indexes 1.54 to 2.14 with no changes. This is designed for those pieces of rough that have color on the thin edge. This works well in about any color and because of the keel it’s good for dichroiac material.
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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