Roval Brilliant: Faceting Design Diagram

Successful tips and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Roval Brilliant".


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

Roval Brilliant (MC39.JRG)
By Jeff R. Graham
Copyright 1999
89.9% Light Return
Angles for R.I. = 1.62
49 facets + 10 facets on girdle = 59
2-fold, mirror-image symmetry
96 index
L/W = 1.414 T/W = 0.749 T/L = 0.530
P/W = 0.615 C/W = 0.210
H/W = (P+C)/W+0.02 = 0.844
P/H = 0.728 C/H = 0.248
Vol./W^3 = 0.516

Addition # 4 - This is more of a brilliant top design, it works well with about any material. The yield is very high and it cuts easily. It works well with a trillion on either side, 1cts+. Cut this in R.I. 1.62 to 1.93 (90.5%) without 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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