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


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

Hunter (MC68.JRG)
By Jeff R. Graham
Copyright 2002
83.6% Light Return
Angles for R.I. = 1.73
43 facets + 12 facets on girdle = 55
1-fold, mirror-image symmetry
96 index
L/W = 1.155 T/W = 0.443 T/L = 0.383
P/W = 0.460 C/W = 0.173
H/W = (P+C)/W+0.02 = 0.653
P/H = 0.704 C/H = 0.265
Vol./W^3 = 0.260

Addition # 7 – This cuts pretty well in Tourmaline (75.4%), and in 1.73 to 1.93 with no changes. L/W=1.155, it’s important to be at the correct L/W. Be sure to cut your center point lined up with the dop. Cut P1 and P6 (alternate) to center the stone on your dop. Watch your L/W on this, it is important that it be right. P13 and P14 can be off if you are not right on the L/W. This can be a bit touchy to cut and I do not recommend it for a beginner.

 


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.