Viking’s Luck: Faceting Design Diagram
Successful tips and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Viking's Luck".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Viking's Luck (CHECK71.JRG)
By Jeff R. Graham
Copyright 2003
82.7% Light Return
Angles for R.I. = 1.62
47 facets + 8 facets on girdle = 55
2-fold, mirror-image symmetry
96 index
L/W = 1.602 T/W = 0.515 T/L = 0.322
P/W = 0.436 C/W = 0.262
H/W = (P+C)/W+0.02 = 0.717
P/H = 0.607 C/H = 0.365
Vol./W^3 = 0.516
Addition # 8 - This is not very easy to cut, but after you have done it once, it's not hard the next time. The L/W is not critical but should be close. Cut In refractive indexes 1.62 tp 2.14 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
Trapiche Gems: An Introduction
How Do Tourmalines Form?
How to Describe a Tourmaline Crystal by its C Axis
Latest Articles
Amethyst Sources Around the World: The Geological Story Behind These Purple Gemstones
Brazilianite Value, Price, and Jewelry Information
Ruby-Glass Composites vs Leaded Glass Clarity Enhancements
Morganite Buying Guide
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!