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


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

Red Rose (GNETP8.JRG)
By Jeff R. Graham
Copyright 1993
93.5% Light Return
Angles for R.I. = 1.73
89 facets + 16 facets on girdle = 105
8-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.428 T/L = 0.428
P/W = 0.386 C/W = 0.158
H/W = (P+C)/W+0.02 = 0.564
P/H = 0.685 C/H = 0.280
Vol./W^3 = 0.189

Addition # 3 – This design is shallow to help lighten up dark material and has a very nice flash. The larger facets on the crown read well from a distance. Cut in refractive indexes 1.73 to 2.14 with no changes.

 


Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler