Trapper Check: Faceting Design Diagram

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

Trapper Check (CHECK7.JRG)
By Jeff R. Graham
Copyright 2001
81.7% Light Return
Angles for R.I. = 1.62
27 facets + 8 facets on girdle = 35
2-fold symmetry
96 index
L/W = 1.160 T/W = 0.849 T/L = 0.731
P/W = 0.466 C/W = 0.179
H/W = (P+C)/W+0.02 = 0.665
P/H = 0.701 C/H = 0.269
Vol./W^3 = 0.378

Addition # 6 - This is an odd one… It can be adapted to almost any L/W and I originally designed it for a bi-color. This is not a standard shape for setting, but in most cases should not be a problem.

Random - Cosine - ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler