The Ring: 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 "The Ring".


Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)

The Ring (B22.JRG)
By Jeff R. Graham
Copyright 2000
81% Light Return
Angles for R.I. = 1.62
69 facets + 16 facets on girdle = 85
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.470 T/L = 0.470
P/W = 0.512 C/W = 0.209
H/W = (P+C)/W+0.02 = 0.741
P/H = 0.691 C/H = 0.282
Vol./W^3 = 0.319

Addition # 5 - This is pretty easy to cut and should be done in a light material because it darkens quite a bit. I like this in light colored Tourmaline or Topaz. There are a lot of trapped rays, which show up as a very nice dispersion pattern in the finished stone. This is really nice in Danburite and works well in man-made materials. Cut this in R.I. 1.62 to 1.76 (84.9%) 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.

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