“S” Hex: Faceting Design Diagram

Details and information on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts and facets suitable for different gems.


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

"S" Hex (TLINE10.JRG) 2.40 carat champange Tourmaline
By Jeff R. Graham
Copyright 1994
83.2% Light Return
Angles for R.I. = 1.62
49 facets + 6 facets on girdle = 55
6-fold, mirror-image symmetry
96 index
L/W = 1.155 T/W = 0.589 T/L = 0.510
P/W = 0.430 C/W = 0.196
H/W = (P+C)/W+0.02 = 0.647
P/H = 0.665 C/H = 0.304
Vol./W^3 = 0.251

Gram Book 1 - A fairly standard hex to cut, it has a very nice-star-in-a-star flash and a good light return. Any material in light to medium color is good, I cut this quite often, because Tourmaline crystals are often this shape. Cut in refractive index 1.62 to 2.14 (84.8%) 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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