Edge Oval: 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 "Edge Oval".


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

Edge Oval (SPINEL6.JRG)
By Jeff R. Garaham
Copyright 1998
83% Light Return
Angles for R.I. = 1.72
67 facets + 12 facets on girdle = 79
2-fold, mirror-image symmetry
96 index
L/W = 1.330 T/W = 0.639 T/L = 0.481
P/W = 0.457 C/W = 0.175
H/W = (P+C)/W+0.02 = 0.652
P/H = 0.701 C/H = 0.268
Vol./W^3 = 0.295

Addition # 3 - Cut a preform for 1.33 L/W, this is important because the P1,P3,P5 are just barely NOT cut to center point. You cut to point in P10,P11. This is not really hard to cut and is great in spinel, 1-18cts. This works in Garnets, YAG, and Sapphire.

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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