Circle: Faceting Design Diagram

Detailed information and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Circle".


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

Circle Graham Facet Design 1Circle Graham Facet Design 2

Circle (DOME36.JRG)
By Jeff R. Graham
Copyright 2007
75.7% Light Return
Angles for R.I. = 1.62
73 facets + 8 facets on girdle = 81
8-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.211 T/L = 0.211 P/W = 0.438 C/W = 0.401
H/W = (P+C)/W+0.02 = 0.859 P/H = 0.510 C/H = 0.467
Vol./W^3 = 0.323



Addition # 13 - Cut in refractive indexes 1.62 to 2.14 with no changes. This is designed to help improve lightly saturated rough. I designed it for Afghan Tourmaline nodules, but it works well in any pale to light saturated rough.

Circle Graham Facet Design 3

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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