Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)

24 Rose (DOME29.JRG)
By Jeff R. Graham
Copyright 2007
81.9% Light Return
Angles for R.I. = 1.62
129 facets + 24 facets on girdle = 153
12-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.299 T/L = 0.299 P/W = 0.405 C/W = 0.277
H/W = (P+C)/W+0.02 = 0.702 P/H = 0.577 C/H = 0.395
Vol./W^3 = 0.251

Addition # 13 - Cut in refractive indexes 1.62 to 2.14 with no changes. This is designed for pale to light saturated material and works well in about any color. I like it in pink Tourmaline. This is not hard to cut.

 

 

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