Tejas: Faceting Design Diagram
Successful tips, details and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Tejas".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Tejas (DOME42.JRG)
By Jeff R. Graham
Copyright 2007
92% Light Return
Angles for R.I. = 1.62
51 facets + 10 facets on girdle = 61
5-fold, mirror-image symmetry
80 index
L/W = 1.000 T/W = 0.200 T/L = 0.200 P/W = 0.384 C/W = 0.257
H/W = (P+C)/W+0.02 = 0.661 P/H = 0.581 C/H = 0.389
Vol./W^3 = 0.198
PAVILION
CROWN
Addition # 13 - Cut in refractive indexes 1.62 to 2.14 with no changes. This is very bright and works best in medium saturated material. This is not hard to cut and the shallow dome makes an interesting effect.
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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