Flat Eye: Faceting Design Diagram

Detailed information and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Flat Eye".


Spinel (Red, Pink, Lavender, Green, Blue, Orange, Violet)

Flat Eye (SPINEL8.JRG)
By Jeff R. Graham
Copyright 1998
76% Light Return
Angles for R.I. = 1.71
41 facets + 8 facets on girdle = 49
2-fold, mirror-image symmetry
96 index
L/W = 1.250 T/W = 0.814 T/L = 0.651
P/W = 0.393 C/W = 0.143
H/W = (P+C)/W+0.02 = 0.556
P/H = 0.707 C/H = 0.257
Vol./W^3 = 0.194

Addition # 2 - This is very nice and helps use up some of that flat rough that I always put off cutting. It works well in Garnet, CZ, Zircon, and Sapphire. It's light return is better than the ray trace says, 1/2-8cts.

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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