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

Zippidy Do (MC104.JRG)
By Jeff R. Graham
Copyright 2006
86.7% Light Return
Angles for R.I. = 1.62
118 facets + 12 facets on girdle = 130
3-fold, mirror-image symmetry
96 index
L/W = 1.037 T/W = 0.596 T/L = 0.574 P/W = 0.457
C/W = 0.153 H/W = (P+C)/W+0.02 = 0.630 P/H = 0.725 C/H = 0.243 Vol./W^3 = 0.228

Addition # 12 - Cut in refractive indexes 1.62 to 2.14 (91.2%) with no changes. This is not all that hard to cut and works best in light to medium saturated materials. I designed it for a large light pink Tourmaline.

 

 

Random - Cosine - ISO

Return to OnLine Design Index