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

Wit (SUN10.JRG)
By Jeff R. Graham
Copyright 2006
80.3% Light Return
Angles for R.I. = 1.54
49 facets + 12 facets on girdle = 61
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.514 T/L = 0.514 P/W = 0.466
C/W = 0.202 H/W = (P+C)/W+0.02 = 0.688 P/H = 0.678 C/H = 0.293 Vol./W^3 = 0.295

Addition # 11 - Cut this in refractive indexes 1.54 to 2.14 with no changes. The C1,C2 steps on the crown can be omitted for thin rough. This is designed for light to medium color and is a reflector, which will help get more light into the stone and prevent color mixing. Note: The P3(G) girdle facets just float, cut them as close as you can to the diagram. They are not critical.

 

 

 

Random - Cosine - ISO

Return to OnLine Design Index