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".0
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
The Ring (B22.JRG)
By Jeff R. Graham
81% Light Return
Angles for R.I. = 1.62
69 facets + 16 facets on girdle = 85
4-fold, mirror-image symmetry
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
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