"U" Rect: 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.

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

"U" Rect (TLINE48.JRG)
By Jeff R. Graham
Copyright 1998
82.3% Light Return
Angles for R.I. = 1.62
47 facets + 6 facets on girdle = 53
2-fold, mirror-image symmetry
96 index
L/W = 1.330 T/W = 0.758 T/L = 0.570
P/W = 0.451 C/W = 0.166
H/W = (P+C)/W+0.02 = 0.636
P/H = 0.708 C/H = 0.260
Vol./W^3 = 0.310

Addition # 3 - The 39 degree tier on the Pavilion are below the critical angle for 1.54, but because of the L/W on this cut it works in Quartzs also. This is a good cut for about any material and is not very hard, 1-12cts.


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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