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

Confederate Button (SUN8.JRG)
By Jeff R. Graham
Copyright 2006
95.6% Light Return
Angles for R.I. = 1.54
33 facets + 8 facets on girdle = 41
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.207 T/L = 0.207 P/W = 0.483
C/W = 0.125 H/W = (P+C)/W+0.02 = 0.628 P/H = 0.769 C/H = 0.199 Vol./W^3 = 0.233

Addition # 11 - Cut this in refractive indexes 1.54 to 2.14 with no changes. This works well in dark Garnet. I designed it for thin color/shiller rough. It is designed to be a very bright reflector. Note: There are no breaks on the girdle/crown. You can cut some in at 68 if you want.

 

 

 

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