Faceting Design Diagram: Antique 1 – Garnet – Pyrope, Rhodolite, Almandine, Spessartite, Grossular, Demantoid, Tsavorite


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

Antique 1 (GNETP4.JRG)
By Jeff R. Graham
Copyright 1993
82.7% Light Return
Angles for R.I. = 1.73
41 facets + 8 facets on girdle = 49
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.517 T/L = 0.517
P/W = 0.405 C/W = 0.220
H/W = (P+C)/W+0.02 = 0.645
P/H = 0.628 C/H = 0.341
Vol./W^3 = 0.235

Gram Book 1 – This design is fairly simple to cut and makes a nice stone in about any material. Try cutting it in a lighter colored material, it makes nice earrings or ring, 1-6cts. Works in man-made Sapphire and Spinel. Cut in refractive indexes 1.73 to 2.14 (88.6%) with no changes.


Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

Gram Faceting Archive of Information
This edited version of an article by the late Jeff Graham is part of a special archived informational series from Gram Faceting. Used with permission.