133 Oval: Faceting Design Diagram
Details and information on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts and facets suitable for different gems.
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
133 Oval (B2.JRG)
By Jeff R. Graham
88.8% Light Return
Angles for R.I. = 1.62
65 facets + 12 facets on girdle = 77
2-fold, mirror-image symmetry
L/W = 1.330 T/W = 0.845 T/L = 0.635
P/W = 0.569 C/W = 0.193
H/W = (P+C)/W+0.02 = 0.781
P/H = 0.728 C/H = 0.247
Vol./W^3 = 0.414
Addition # 5 - This is nice and works well in R.I. 1.62-1.93 with no changes. This is a good basic standard oval Barion, with a lot of performance. The number of facets is fairly low and this cuts pretty fast.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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