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

Pink Ghost (DOME28.JRG)
By Jeff R. Graham
Copyright 2007
76.7% Light Return
Angles for R.I. = 1.62
109 facets + 12 facets on girdle = 121
12-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.288 T/L = 0.288 P/W = 0.419 C/W = 0.369
H/W = (P+C)/W+0.02 = 0.808 P/H = 0.519 C/H = 0.456
Vol./W^3 = 0.304

Addition # 13 - Cut in refractive indexes 1.62 to 2.14 with no changes. This is designed for pale to light colored material. This design will help improve color as well as dispersion. This is not hard to cut and works well in about any material.

 

 

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