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
83% Light Return
Angles for R.I. = 1.72
67 facets + 12 facets on girdle = 79
2-fold, mirror-image symmetry
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
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