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

Athena (SUN34.JRG)
By Jeff R. Graham
Copyright 2006
86.1% Light Return
Angles for R.I. = 1.54
27 facets + 6 facets on girdle = 33
2-fold, mirror-image symmetry
96 index
L/W = 1.500 T/W = 1.232 T/L = 0.821 P/W = 0.450
C/W = 0.171 H/W = (P+C)/W+0.02 = 0.642 P/H = 0.702 C/H = 0.267 Vol./W^3 = 0.471

Addition # 11 - Cut this in refractive indexes 1.54 to 2.14 with no changes. This is very nice and designed for color, it is great in Aquamarine and Tourmaline. This is not hard to cut but can be a little tricky. Note: The C4 cuts to make C3 a pointed diamond. Expect to have to tweak the crown.

 

 

 

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