Foiled: 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 "Foiled".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
By Jeff R. Graham
91.6% Light Return
Angles for R.I. = 1.62
67 facets + 12 facets on girdle = 79
6-fold, mirror-image symmetry
L/W = 1.073 T/W = 0.416 T/L = 0.388
P/W = 0.430 C/W = 0.209
H/W = (P+C)/W+0.02 = 0.658
P/H = 0.653 C/H = 0.317
Vol./W^3 = 0.237
Addition # 7 - This is nice, easy to cut and has a fancy look to it when finished. Cut in refractive indexes 1.62 to 1.93 with no changes. This is very good for light to medium saturated materials.
Random - Cosine - ISO
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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