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

Ojo Glitter (MC94.JRG)
By Jeff R. Graham
Copyright 2006
87.5% Light Return
Angles for R.I. = 1.62
129 facets + 12 facets on girdle = 141
2-fold, mirror-image symmetry
96 index
L/W = 1.180 T/W = 0.494 T/L = 0.418 P/W = 0.508
C/W = 0.204 H/W = (P+C)/W+0.02 = 0.733 P/H = 0.694 C/H = 0.279 Vol./W^3 = 0.316

Addition # 12 - Cut in refractive indexes 1.62 to 2.14 (89.2%) with no changes. This is complicated to cut and not for a novice but, actually, once you have cut it correctly it is not difficult at all. This is for a large stone.

 

 

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