Cut Corner Pent: Faceting Design Diagram
Successful tips and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Cut Corner Pent".
Garnet (Pyrope, Rhodolite, Almandine, Spessartite, Grossular, Demantoid, Tsavorite)
Cut Corner Pent (GNETP32.JRG)
By Jeff R. Graham
Copyright 1996
87.1% Light Return
Angles for R.I. = 1.73
66 facets + 10 facets on girdle = 76
5-fold, mirror-image symmetry
80 index
L/W = 1.051 T/W = 0.468 T/L = 0.445
P/W = 0.436 C/W = 0.197
H/W = (P+C)/W+0.02 = 0.653
P/H = 0.668 C/H = 0.301
Vol./W^3 = 0.235
Gram Book 1 - Note 80 index. This cuts easy in about any material, 1-6cts. This works well in man-made Sapphire and Spinel. I especially like it in Rhodolite Garnet 2-3cts. Cut in refractive indexes 1.73 to 2.14 with no changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
