Faceting Design Diagram: Uneven Swirl – Garnet – Pyrope, Rhodolite, Almandine, Spessartite, Grossular, Demantoid, Tsavorite

Garnet (Pyrope, Rhodolite, Almandine, Spessartite, Grossular, Demantoid, Tsavorite)

Uneven Swirl (GNETP14.JRG) Chrysoberyl cut by Tony Carson
By Jeff R. Graham
Copyright 1993
80.4% Light Return
Angles for R.I. = 1.73
43 facets + 6 facets on girdle = 49
6-fold symmetry
96 index
L/W = 1.155 T/W = 0.516 T/L = 0.447
P/W = 0.416 C/W = 0.193
H/W = (P+C)/W+0.02 = 0.629
P/H = 0.662 C/H = 0.306
Vol./W^3 = 0.254

Addition # 3 – This design is a little unusual to cut because the P3, P4, facets are not all meet point. Cut them a evenly as you can, they do cut to center point. This design works well in medium to light material, 1-8cts. Cut in refractive indexes 1.73 to 2.14 (81.5%)with no changes.


Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

About the author
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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