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

Glitter Eight (MC88.JRG)
By Jeff R. Graham
Copyright 2003
86.6% Light Return
Angles for R.I. = 1.62
129 facets + 8 facets on girdle = 137
16-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.406 T/L = 0.406 P/W = 0.435
C/W = 0.196 H/W = (P+C)/W+0.02 = 0.651 P/H = 0.669 C/H = 0.301 Vol./W^3 = 0.219

Addition # 12 - This is easy and straight forward to cut, although it should be cut in a large stone because it has a lot of facets. I like it in light to medium colored material. Cut in refractive index 1.62 to 2.14 (87.3%)with no changes.

 

 

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