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


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

Mini Mint (MC67.JRG)
By Jeff R. Graham
Copyright 2002
91.6% Light Return
Angles for R.I. = 1.73
49 facets + 16 facets on girdle = 65
8-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.496 T/L = 0.496
P/W = 0.426 C/W = 0.227
H/W = (P+C)/W+0.02 = 0.673
P/H = 0.633 C/H = 0.337
Vol./W^3 = 0.231

Addition # 7 – This was designed for a piece of mint Garnet I had. The crown is very deep and the pavilion is simple for small light colored rough. Cut this in refractive index 1.62 (80.9% with pavilion at 39 degrees) to 2.20 with no changes. Try it on a small light colored piece of rough, you will be surprised. Mains can be cut in at 39 degrees if you want…

 


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.