Pent Point: Faceting Design Diagram

Successful tips and a guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Pent Point".


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

Pent Point (GNETP33.JRG)
By Jeff R. Graham
Copyright 1996
86.2% Light Return
Angles for R.I. = 1.73
51 facets + 5 facets on girdle = 56
5-fold, mirror-image symmetry
80 index
L/W = 1.051 T/W = 0.537 T/L = 0.511
P/W = 0.424 C/W = 0.151
H/W = (P+C)/W+0.02 = 0.595
P/H = 0.713 C/H = 0.253
Vol./W^3 = 0.196

Gram Book 1 - Note 80 index. Easy to cut and fast. Good in about any material and shallow enough for darker material, 1-6cts. This is a nice change from a round brilliant and sells well. Works in man-made Sapphire and Spinel.

Random - Cosine - ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

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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