Bonz: Faceting Design Diagram

Quartz (Amethyst, Citrine, Ametrine, Smokey, Rose)

Bonz (CHECK53.JRG)
By Jeff R. Graham
Copyright 2002
84.9% Light Return
Angles for R.I. = 1.54
43 facets + 8 facets on girdle = 51
2-fold, mirror-image symmetry
96 index
L/W = 1.428 T/W = 0.371 T/L = 0.260
P/W = 0.450 C/W = 0.194
H/W = (P+C)/W+0.02 = 0.664
P/H = 0.677 C/H = 0.292
Vol./W^3 = 0.430

Addition # 8 - This cuts fairly easy. The keel is on the long side (watch for chips) and P4, P9 can be adjusted in to fit your rough, if needs be. This is designed for long Tourmaline and Beryl crystals, it works well in dark colors and closed "c" axis material. Cut in refractive indexes 1.54 to 2.14 with no changes.

Random - Cosine - ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler