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


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

Ten Seagulls (GNETP20.JRG)
By Jeff R. Graham
Copyright 1994 83.8%
Light Return Angles for R.I. = 1.73
46 facets + 6 facets on girdle = 52
3-fold, mirror-image symmetry
96 index
L/W = 1.155 T/W = 0.522 T/L = 0.452
P/W = 0.416 C/W = 0.229
H/W = (P+C)/W+0.02 = 0.665
P/H = 0.626 C/H = 0.344
Vol./W^3 = 0.273

Gram Book 1 – This design is a little harder to cut than it looks like, but it cuts fairly fast and makes a nice 1-4 ct stone in most to light medium material. Cut in refractive index 1.73 to 1.93 with no changes.


Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler