Bag of Diamonds: Faceting Design Diagram
Details and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Bag of Diamonds".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Bag of Diamonds (CHECK55.JRG)
By Jeff R. Graham
86.4% Light Return
Angles for R.I. = 1.62
27 facets + 8 facets on girdle = 35
2-fold, mirror-image symmetry
L/W = 2.000 T/W = 0.961 T/L = 0.480
P/W = 0.418 C/W = 0.204
H/W = (P+C)/W+0.02 = 0.642
P/H = 0.651 C/H = 0.318
Vol./W^3 = 0.640
Addition # 8 - The diamonds will vary a bit depending on the C1,C4 tiers. Cut the table in and then the C6 to meet makes it easier. This is designed for Tourmaline, but will work well in refractive indexes 1.62 to 1.93 with no changes.
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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