Old Style 2: Faceting Design Diagram
Tips, details, and a guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Old Style 2".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Old Style 2 (TLINE63.JRG)
By Jeff R. Graham
Copyright 1998
86% Light Return
Angles for R.I. = 1.62
73 facets + 8 facets on girdle = 81
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.458 T/L = 0.458
P/W = 0.417 C/W = 0.166
H/W = (P+C)/W+0.02 = 0.603
P/H = 0.692 C/H = 0.275
Vol./W^3 = 0.202
Addition # 2 - The crown on this design can be hard to cut. The C5,C6 tiers are close and can be tough to get right. The P5 tier is not center point, cut it until the P4 are just tapered, any material, 1-18cts. Cut in refractive indexes 1.62 to 1.76 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 Value, Price, and Jewelry Information
How to Describe a Tourmaline Crystal by its C Axis
Gemstone Examination Lesson
A Beginner’s Guide To Common Gemstone Heat Treatments
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!