Rapids: Faceting Design Diagram
Successful tips, details and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Rapids".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Rapids (DOME40.JRG)
By Jeff R. Graham
Copyright 2007
83.1% Light Return
Angles for R.I. = 1.62
97 facets + 12 facets on girdle = 109
12-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.349 T/L = 0.349 P/W = 0.419 C/W = 0.315
H/W = (P+C)/W+0.02 = 0.754 P/H = 0.556 C/H = 0.418
Vol./W^3 = 0.267
PAVILION
CROWN
Addition # 13 - Cut in refractive indexes 1.62 to 2.14 with no changes. This is designed for pale to lightly saturated material and is ideal for nodules. It is not hard to cut, but there are quite a few facets so it will take some time.
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
Green Tourmaline and Rubellite: Emerald-Cutting Advice
A Look at African Paraíba Tourmaline Rough
A View of the Quartzsite Gem Shows
Latest Articles
Morganite Buying Guide
How Do Amethysts Form?
Rhodizite Value, Price, and Jewelry Information
Pearl Treatments and Enhancements
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!