Antique 1: Faceting Design Diagram

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