Dome Brilliant: Faceting Design Diagram
Detailed information and guide on Faceting Designs. Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called Dome Brilliant.
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Dome Brilliant (DOME41.JRG)
By Jeff R. Graham
Copyright 2007
81.6% Light Return
Angles for R.I. = 1.62
85 facets + 12 facets on girdle = 97
12-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.262 T/L = 0.262 P/W = 0.405 C/W = 0.419
H/W = (P+C)/W+0.02 = 0.843 P/H = 0.480 C/H = 0.496
Vol./W^3 = 0.310
PAVILION
CROWN
Addition # 13 - Cut in refractive indexes 1.62 to 2.14 with no changes. This is designed for pale to lightly saturated material and is ideal for nodules. It is not hard to cut, but there are quite a few facets and it will take some time.
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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