Shutter 7: Faceting Design Diagram
Successful tips, details and guide on Faceting Designs. Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Shutter 7"
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Shutter 7 (DOME33.JRG)
By Jeff R. Graham
83.8% Light Return
Angles for R.I. = 1.62
57 facets + 7 facets on girdle = 64
L/W = 1.026 T/W = 0.220 T/L = 0.215 P/W = 0.398 C/W = 0.385
H/W = (P+C)/W+0.02 = 0.802 P/H = 0.495 C/H = 0.480
Vol./W^3 = 0.277
Addition # 13 - Cut in refractive indexes 1.62 to 2.14 with no changes. This is seven sided and will need a custom mounting. The flash is very interesting and this works best in light saturated material.
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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