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

Murmur (MIR73.JRG)
By Jeff R. Graham
Copyright 2005
85.5% light Return
Angles for R.I. = 1.62
61 facets + 10 facets on girdle = 71
10-fold, mirror-image symmetry
80 index
L/W = 1.051 T/W = 0.262 T/L = 0.250 P/W = 0.426
C/W = 0.260 H/W = (P+C)/W+0.02 = 0.706 P/H = 0.603 C/H = 0.369 Vol./W^3 = 0.238

Addition # 10 - Cut in refractive indexes 1.62 to 2.14 with no changes. This is pretty neat, it has a very flower-like look and is a different looking round. It is fun and fast to cut and works well in any light to medium colored material. I like Tourmaline.

 

 

 

Random - Cosine - ISO

Return to OnLine Design Index