Cushion Triple Star: Faceting Design Diagram
Successful tips and guide on Faceting Designs. Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called Cushion Triple Star.0
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Cushion Triple Star (TLINE9.JRG)
By Jeff R. Graham
80.9% Light Return
Angles for R.I. = 1.62
89 facets + 16 facets on girdle = 105
4-fold, mirror-image symmetry
L/W = 1.000 T/W = 0.539 T/L = 0.539
P/W = 0.449 C/W = 0.210
H/W = (P+C)/W+0.02 = 0.679
P/H = 0.662 C/H = 0.309
Vol./W^3 = 0.248
Gram Book 1 - This is a nice design for most any material and/or color. It cuts pretty fast and is not hard, yet it looks like it is involved to do, 1-16cts. Cut in refractive index 1.62 to 2.14 (83.9%) with no changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
Tourmaline Value, Price, and Jewelry Information
Mint Tourmalines: Gemstones for Our Times
Tourmaline Engagement Ring Stones: the Ultimate Guide
How Do Tourmalines Form?
Azurite Value, Price, and Jewelry Information
An Introduction to the Lapidary Arts
Crystalline Quartz Buying Guide
How Does Vapor Deposition Create Mystic Topaz and Aqua Aura Quartz?
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
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!