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.

 

 

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