Bonz: Faceting Design Diagram
Detailed information and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Bonz".
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
Related Articles
Rose Quartz Value, Price, and Jewelry Information
Ametrine Value, Price, and Jewelry Information
Amethyst Gem, Price, and Jewelry Information
Citrine Value, Price, and Jewelry Information
Latest Articles
800 Years of Mogok: A Celebration in Tenuous Times
What is the Average Gemstone Faceting Yield?
Pyroxmangite Value, Price, and Jewelry Information
How to Identify Emerald Simulants and Synthetics
Never Stop Learning
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
