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"
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Shutter (DOME26.JRG)
By Jeff Graham
Copyright 2007
82.4 % Light Return
Angles for R.I. = 1.62
65 facets + 8 facets on girdle = 73
8-fold symmetry
96 index
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
PAVILION
CROWN
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
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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