Tabby: 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 "Tabby".


Quartz (Amethyst, Citrine, Ametrine, Smokey, Rose)

Tabby (B8.JRG)
By Jeff R. Graham
Copyright 1999
78.4% Light Return
Angles for R.I. = 1.54
79 facets + 18 facets on girdle = 97
3-fold, mirror-image symmetry
96 index
L/W = 1.005 T/W = 0.591 T/L = 0.588
P/W = 0.515 C/W = 0.139
H/W = (P+C)/W+0.02 = 0.674
P/H = 0.765 C/H = 0.206
Vol./W^3 = 0.238

Addition # 5 - This cuts nicly in a large Quartz or Topaz. Cut P1 to center point, then cut the girdle to meet, then cut in the breaks. The light ray trace is misleading, it is really a bright stone, especially in light material. This is 91.2% in R.I. 1.62 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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