Angel Fire: Faceting Design Diagram
Details and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Angel Fire- Tourmaline".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Angel Fire (B33.JRG)
By Jeff R. Graham
87.7% Light Return
Angles for R.I. = 1.62
61 facets + 8 facets on girdle = 69
4-fold, mirror-image symmetry
L/W = 1.000 T/W = 0.527 T/L = 0.527
P/W = 0.497 C/W = 0.183
H/W = (P+C)/W+0.02 = 0.700
P/H = 0.711 C/H = 0.261
Vol./W^3 = 0.292
Addition # 5 - This cuts fast and is very bright. It works well in R.I. 1.62 to 1.93 with no changes. It should be cut in a decent sized stone because the crown facets are fairly small.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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