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


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

Laced Garnet (GNETR2.JRG)
By Jeff R. Graham
Copyright 1994
83.3% Light Return
Angles for R.I. = 1.73
73 facets + 6 facets on girdle = 79
6-fold, mirror-image symmetry
96 index
L/W = 1.155 T/W = 0.539 T/L = 0.467
P/W = 0.435 C/W = 0.241
H/W = (P+C)/W+0.02 = 0.696
P/H = 0.625 C/H = 0.346
Vol./W^3 = 0.283

Gram Book 1 – Here is a pretty one, I like it best in a light Garnet, Rose Malaya or Rhodolite work well, but not too large. Be careful when you cut the C3 facets, they have to be exact to meet the table. A larger stone is better, 1-6cts. Man-made Sapphire and Spinel work well. Cut in refractive index 1.73 to 1.93 (83.8%) 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.