Faceting Design Diagram: N-Star – Garnet – Pyrope, Rhodolite, Almandine, Spessartite, Grossular, Demantoid, Tsavorite


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

N-Star (GNETP9.JRG) 2.55 carat Rhodolite
By Jeff R. Graham
Copyright 1993
92.6% Light Return
Angles for R.I. = 1.73
61 facets + 8 facets on girdle = 69
4-fold, mirror-image symmetry
96 index
L/W = 1.000
T/W = 0.408 T/L = 0.408
P/W = 0.371 C/W = 0.185
H/W = (P+C)/W+0.02 = 0.576
P/H = 0.644 C/H = 0.321
Vol./W^3 = 0.201

Gram Book 1 – This design is a little more complicated to cut, and works well with dark to medium material, 1-5ct. It’s cut a little shallow to help lighten dark material. This is a classic shape and works well in man- made Sapphire and Spinel.


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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