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

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

Arabian Star (MC66.JRG) Mombo Garnet
By Jeff R. Graham
Copyright 2002
90% Light Return
Angles for R.I. = 1.62
37 facets + 8 facets on girdle = 45
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.405 T/L = 0.405
P/W = 0.447 C/W = 0.186
H/W = (P+C)/W+0.02 = 0.653
P/H = 0.684 C/H = 0.285
Vol./W^3 = 0.253

Addition # 7 – If you like my “Tic Tac” design then you will love this one. The crown on this design is very striking in a large sized stone where it can be easily seen. Cut in refractive indexes 1.62 to 1.93 with no changes.

 


Random – Cosine – ISO

 

Detailed faceting instructions by Jeff Graham available at The Rock Peddler