Faceting Design Diagram: Star Gate 6 – Garnet – Pyrope, Rhodolite, Almandine, Spessartite, Grossular, Demantoid, Tsavorite


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

Star Gate 6 (GNETR4.JRG)
By Jeff R. Graham
Copyright 1993
87% Light Return
Angles for R.I. = 1.73
103 facets + 6 facets on girdle = 109
6-fold, mirror-image symmetry
96 index
L/W = 1.155 T/W = 0.554 T/L = 0.480
P/W = 0.443 C/W = 0.236
H/W = (P+C)/W+0.02 = 0.698
P/H = 0.634 C/H = 0.338
Vol./W^3 = 0.284

Gram Book 1 – This is a good design for a large piece of Rhodolite rough. Because of the number of facets, I recommend that this stone should be cut on 2cts+ size. About any other light-colored Garnet will work well. Works in man-made YAG, Sapphire, Spinel


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.