Four Arrows: 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 "Four Arrows"
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Four Arrows (MC81.JRG)
By Jeff R. Graham
Copyright 2002
91.8% Light Return
Angles for R.I. = 1.62
49 facets + 8 facets on girdle = 57
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.244 T/L = 0.244
P/W = 0.445 C/W = 0.203
H/W = (P+C)/W+0.02 = 0.668
P/H = 0.666 C/H = 0.304
Vol./W^3 = 0.260
Addition # 7 - This is nice in about any material, I often use it for cutting dark stones. Cut in refractive indexes 1.62 to 2.14 with no changes. This makes good earrings, easy to set and are low profile so they wear well.
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 Value, Price, and Jewelry Information
Mint Tourmalines: Gemstones for Our Times
Tourmaline Engagement Ring Stones: the Ultimate Guide
How Do Tourmalines Form?
Latest Articles
32 Green Gemstones (How Many Do You Know?)
A Guide to Antique Georgian Jewelry
Hambergite Value, Price, and Jewelry Information
Faceting a Gemstone Pendulum to Feature Inclusions
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!