Diamond Back: 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 "Diamond Back"

Home Learning Center Jewelry and Lapidary Gemstone Faceting Diagrams and Technical Cutting InformationDiamond Back: Faceting Design Diagram

By Jeff R. Graham

Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)

Diamond Back (CHECK72.JRG)
By Jeff R. Graham
Copyright 2003
81.5% Light Return
Angles for R.I. = 1.62
27 facets + 6 facets on girdle = 33
2-fold, mirror-image symmetry
96 index
L/W = 1.33 T/W = 0.590 T/L = 0.457
P/W = 0.418 C/W = 0.146
H/W = (P+C)/W+0.02 = 0.584
P/H = 0.716 C/H = 0.250
Vol./W^3 = 0.217

Addition # 8 - Cut in refractive indexes 1.54 (78.4%) to 2.14 with no changes. This is a neat one, named after a local varmit we have in Tucson in the summer- time (rattlesnakes). This cuts fast and is good in about any material. The L/W on this can vary a bit with no problem.

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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