Shutter: Faceting Design Diagram
Successful tips, details and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Shutter"0
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
By Jeff Graham
82.4 % Light Return
Angles for R.I. = 1.62
65 facets + 8 facets on girdle = 73
L/W = 1.000 T/W = 0.211 T/L = 0.211 P/W = 0.415 C/W = 0.315
H/W = (P+C)/W+0.02 = 0.750 P/H = 0.553 C/H = 0.420
Vol./W^3 = 0.259
Addition # 13 - Cut in refractive indexes 1.62 to 2.14 with no changes. This is designed for light saturated rough, and is best cut in a large stone. The light flash is very interesting and this is pretty unique.
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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