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


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

Rhodolite Rose (GNETR1.JRG)
By Jeff R. Graham
Copyright 1993
85.8% Light Return
Angles for R.I. = 1.73
153 facets + 8 facets on girdle = 161
8-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.508 T/L = 0.508
P/W = 0.425 C/W = 0.210
H/W = (P+C)/W+0.02 = 0.655
P/H = 0.649 C/H = 0.320
Vol./W^3 = 0.248

Gram Book 1 – It is all cut to center point and cuts easy. A larger size stone is better but it can be cut small. This works well in man-made Sapphire and CZ if you want to cut it large, but cannot find, or can afford, a large piece of natural rough. Cut in refractive index 1.73 to 2.14 (88.7%) 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.