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