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

Sun Drop (SUN35.JRG)
By Jeff R. Graham
Copyright 2006
79.8% Light Return
Angles for R.I. = 1.54
22 facets + 8 facets on girdle = 30
1-fold, mirror-image symmetry
96 index
L/W = 1.936 T/W = 1.520 T/L = 0.785 P/W = 0.458
C/W = 0.177 H/W = (P+C)/W+0.02 = 0.654 P/H = 0.700 C/H = 0.270 Vol./W^3 = 0.466

Cut this in refractive indexes 1.54 to 2.14 with no changes. This is designed for shiler or color. Note: A preform of the correct L/W is the best way to cut this. The P4(G), P5(G) are equal size. L/W is not critical, but this design not fo a beginner.

 

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