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
Copyright 2001
88.8% Light Return
Angles for R.I. = 1.62
65 facets + 12 facets on girdle = 77
2-fold, mirror-image symmetry
96 index
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

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.

Never Stop Learning

When you join the IGS community, you get trusted diamond & gemstone information when you need it.

Become a Member

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!