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


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

Plus Motive (GNETP28.JRG)
By Jeff R. Graham
Copyright 1996
75% Light Return
Angles for R.I. = 1.73
77 facets + 8 facets on girdle = 85
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.417 T/L = 0.417
P/W = 0.430 C/W = 0.212
H/W = (P+C)/W+0.02 = 0.663
P/H = 0.650 C/H = 0.320
Vol./W^3 = 0.254

Gram Book 1 – This design cuts fairly easy. Watch the P6 meet, it’s on the apex/point formed by the P4,P5 facets. Cut in a light to medium material,(Grossular is good) 1-8cts. Cut in refractive indexes 1.73 to 2.14 (83.9%) 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.