Sword Oval: Faceting Design Diagram

Sapphire / Corundum (Ruby, Ceylon, Padparadschah, Pink, Yellow, Green)

Sword Oval (SAP13.JRG)
By Jeff R. Graham
Copyright 1995
77.3% Light Return
Angles for R.I. = 1.76
65 facets + 12 facets on girdle = 77
2-fold, mirror-image symmetry
96 index
L/W = 1.203 T/W = 0.542 T/L = 0.451
P/W = 0.482 C/W = 0.258
H/W = (P+C)/W+0.02 = 0.760
P/H = 0.634 C/H = 0.340
Vol./W^3 = 0.323

Gram Book 1 - This design cuts pretty normal, it makes a nice stone in lighter colored material. It's got more light return than most ovals, and it's not too shallow on the crown like some CAD designs, 1-8cts. This works in man- made Sapphire, and Spinel.

Random - Cosine - ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler