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

Edwardian (CHECK39.JRG)
By Jeff R. Graham
Copyright 2001
84.1% Light Return
Angles for R.I. = 1.62
31 facets + 4 facets on girdle = 35
2-fold, mirror-image symmetry
120 index
L/W = 1.000 T/W = 0.280 T/L = 0.280
P/W = 0.307 C/W = 0.175
H/W = (P+C)/W+0.02 = 0.503
P/H = 0.611 C/H = 0.349
Vol./W^3 = 0.125

Addition # 6 - This one is a little tough to cut, but not too bad. The C3,C4,C5 need to be cut to equal size, there are no meets at the girdle. The rest just line up to them. Leave a little extra girdle, you may need to cut the top a couple times to get it right.

 

 

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