Sunstone (Feldspar, Bytonite, Labradorite, Spectrolite, Orthoclase)
Split Flash (SUN27.JRG)
By Jeff R. Graham
Copyright 2006
90.6% 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 = 2.009 T/L = 0.670 P/W = 0.450
C/W = 0.133 H/W = (P+C)/W+0.02 = 0.604 P/H = 0.746 C/H = 0.221 Vol./W^3 = 1.051
PAVILION
CROWN
Addition # 11 – Cut this in refractive indexes 1.54 to 2.14 with no changes. This is designed for color and light shiller. The pavilion will reflect any color and shiller well. Sunstone seems to occur in long shallow layers and this is for that type of rough. The L/W is not critical.
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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