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

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

Seagull Variation (GNETP21.JRG)
By Jeff R. Graham
Copyright 1994
80.5% Light Return
Angles for R.I. = 1.73
52 facets + 6 facets on girdle = 58
3-fold, mirror-image symmetry
96 index
L/W = 1.155 T/W = 0.576 T/L = 0.499
P/W = 0.416 C/W = 0.200
H/W = (P+C)/W+0.02 = 0.636
P/H = 0.655 C/H = 0.314
Vol./W^3 = 0.263

Addition # 2 – This design takes a little thinking to cut because of the 3-sym facets that are used (the crown in particular). However, it does not have a lot of facets and can be cut fairly fast, 1-6cts light to medium material. This works in man-made Sapphire, YAG, and Spinel.

Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

About the author
Jeff R. Graham
The late Jeff Graham was a prolific faceter, creator of many original faceting designs, and the author of several highly-regarded instructional faceting books such as Gram Faceting Designs.
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