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

Foxy (CHECK22.JRG)
By Jeff R. Graham
Copyright 2001
90.7% Light Return
Angles for R.I. = 1.62
53 facets + 8 facets on girdle = 61
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.196 T/L = 0.196
P/W = 0.449 C/W = 0.195
H/W = (P+C)/W+0.02 = 0.664
P/H = 0.676 C/H = 0.294
Vol./W^3 = 0.257

Addition # 6 - This design is very bright and works well in refractive indexes 1.62 to 1.93 with no changes. I like this design in about any material.

 

 

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