Crush: 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 "Crush".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Crush (B36.JRG)
By Jeff R. Graham
Copyright 2001
88.1% Light Return
Angles for R.I. = 1.62
51 facets + 10 facets on girdle = 61
2-fold, mirror-image symmetry
96 index
L/W = 1.396 T/W = 0.921 T/L = 0.660
P/W = 0.586 C/W = 0.169
H/W = (P+C)/W+0.02 = 0.774
P/H = 0.756 C/H = 0.218
Vol./W^3 = 0.451
Addition # 5 - This needs a preform, but does not have a lot of facets and cuts pretty fast. It is really a "Money Cut"… This works in R.I. 1.62 to 1.93 with no changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
Jeff R. Graham
The late Jeff Graham was a prolific faceter, creator of many original faceting designs, and the author of several highly-regarded instructional faceting books such as Gram Faceting Designs.
Related Articles
Tourmaline Gem, Price, and Jewelry Information
A Look at African Paraíba Tourmaline Rough
How Do Tourmalines Form?
Siberite Tourmaline Material
Latest Articles
Pearl Simulants: How to Spot Faux Pearls
Opal Buying Guide
Amethyst Sources Around the World: The Geological Story Behind These Purple Gemstones
Brazilianite Value, Price, and Jewelry Information
Never Stop Learning
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
Get Gemology Insights
Get started with the International Gem Society’s free guide to gemstone identification. Join our weekly newsletter & get a free copy of the Gem ID Checklist!