Icon Square: 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 "Icon Square".
Garnet (Pyrope, Rhodolite, Almandine, Spessartite, Grossular, Demantoid, Tsavorite)
Icon Square (GNETP30.JRG)
By Jeff R. Graham
Copyright 1996
84.2% Light Return
Angles for R.I. = 1.73
77 facets + 12 facets on girdle = 89
1-fold symmetry
96 index
L/W = 1.000 T/W = 0.479 T/L = 0.479
P/W = 0.446 C/W = 0.235
H/W = (P+C)/W+0.02 = 0.701
P/H = 0.636 C/H = 0.335
Vol./W^3 = 0.276
Gram Book 1 - This design is standard to cut, but because of the number of facets it should be cut in a large size. Light material like Grossular Garnet works best, it will deepen color, 2-12cts. This works in man-made YAG,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.
Related Articles
Garnet Value, Price, and Jewelry Information
Faceted Gemstones And Light Return Measurements
Red and More: Choosing Garnet Engagement Ring Stones
Identifying Garnets Simplified
Never Stop Learning
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
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!