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

"R" Crossed (SAP19.JRG)
By Jeff R. Graham
Copyright 1998
75% Light Return
Angles for R.I. = 1.76
61 facets + 12 facets on girdle = 73
2-fold, mirror-image symmetry
96 index
L/W = 1.500 T/W = 0.908 T/L = 0.606
P/W = 0.445 C/W = 0.200
H/W = (P+C)/W+0.02 = 0.665
P/H = 0.669 C/H = 0.301
Vol./W^3 = 0.406

Addition # 2 - Roughing in the table at about the time you cut the C5 tier makes this much easier to meet. This design is a hard one to cut because of the meets on the crown, but it makes a very nice stone, 1-18cts. This works well in man-made material.

 

 

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