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
