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

Pod (CHECK1.JRG)
By Jeff R. Graham
Copyright 2001
88.9% Light Return
Angles for R.I. = 1.62
25 facets + 6 facets on girdle = 31
2-fold, mirror-image symmetry
96 index
L/W = 1.207 T/W = 0.343 T/L = 0.284
P/W = 0.419 C/W = 0.220
H/W = (P+C)/W+0.02 = 0.659
P/H = 0.636 C/H = 0.333
Vol./W^3 = 0.381

Addition # 6 - This is fun and fast... Like a lot of my designs this was created with a particular piece of rough in mind. The rough was green with a pink triangular shaped center. I wanted something that would not mix the colors and show off the fact that the stone was bi-color. This is what I came up with. Notice that the flashes are square, this is also something that I designed for... this works well in almost any material.

 

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