Faceting Design Diagram: Flat Eye – Spinel – Red, Pink, Lavender, Green, Blue, Orange, Violet


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