N-Star: Faceting Design Diagram

Successful tips, details, and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "N-Star"


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

N-Star (GNETP9.JRG) 2.55 carat Rhodolite
By Jeff R. Graham
Copyright 1993
92.6% Light Return
Angles for R.I. = 1.73
61 facets + 8 facets on girdle = 69
4-fold, mirror-image symmetry
96 index
L/W = 1.000
T/W = 0.408 T/L = 0.408
P/W = 0.371 C/W = 0.185
H/W = (P+C)/W+0.02 = 0.576
P/H = 0.644 C/H = 0.321
Vol./W^3 = 0.201

Gram Book 1 - This design is a little more complicated to cut, and works well with dark to medium material, 1-5ct. It's cut a little shallow to help lighten dark material. This is a classic shape and works well 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.

Never Stop Learning

When you join the IGS community, you get trusted diamond & gemstone information when you need it.

Become a Member

Get Gemology Insights

Get started with the International Gem Society’s free guide to gemstone identification. Join our weekly newsletter & get a free copy of the Gem ID Checklist!