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

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.