Flutter: Faceting Design Diagram
Detailed information and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Flutter".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Flutter (CHECK79.JRG)
By Jeff R. Graham
Copyright 2003
81.5% Light Return
Angles for R.I. = 1.62
35 facets + 12 facets on girdle = 47
2-fold, mirror-image symmetry
96 index
L/W = 1.200 T/W = 0.349 T/L = 0.291
P/W = 0.436 C/W = 0.230
H/W = (P+C)/W+0.02 = 0.686
P/H = 0.636 C/H = 0.335
Vol./W^3 = 0.234
Addition # 8 - Cut in refractive indexes 1.62 to 2.14 (86.4%) with no changes. This cuts easily with no real surprises.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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