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

Step Flower (TLINE17.JRG)
By Jeff R. Graham
Copyright 1995
81.7% Light Return
Angles for R.I. = 1.62
85 facets + 6 facets on girdle = 91
6-fold, mirror-image symmetry
96 index
L/W = 1.155 T/W = 0.526 T/L = 0.456
P/W = 0.452 C/W = 0.243
H/W = (P+C)/W+0.02 = 0.715
P/H = 0.633 C/H = 0.339
Vol./W^3 = 0.290

Addition # 1 - This design cuts fairly normal except for the step on the crown, which needs to be watched for size. It makes a nice stone in any material, I like it in light colors, 1-8cts. Cut in refractive indexes 1.62 to 1.93 (83.6%) with no changes.

 

 

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