Universal Oval: Faceting Design Diagram

Apatite (Yellow, Green, Neon, Blue)

Universal Oval (APAT2.JRG)
By Jeff R. Graham
Copyright 1998
86% Light Return
Angles for R.I. = 1.64
71 facets + 16 facets on girdle = 87
2-fold, mirror-image symmetry
96 index
L/W = 1.330 T/W = 0.748 T/L = 0.563
P/W = 0.435 C/W = 0.177
H/W = (P+C)/W+0.02 = 0.632
P /H = 0.688 C/H = 0.280
Vol./W^3 = 0.302

Addition # 3 - This also works in Peridot, Spinel, Garnet, & Sapphire. It cuts well and is pretty standard. It has nice light return for an oval and works in most material. Cut in light to medium material, 1-24cts.

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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