Faceting Design Diagram: Flex Cushion – Sapphire / Corundum – Ruby, Ceylon, Padparadschah, Pink, Yellow, Green


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

Flex Cushion (B28.JRG)
By Jeff R. Graham
Copyright 2001
89.4% Light Return
Angles for R.I. = 1.76
73 facets + 20 facets on girdle = 93
2-fold, mirror-image symmetry
96 index
L/W = 1.250 T/W = 0.782 T/L = 0.626
P/W = 0.597 C/W = 0.164
H/W = (P+C)/W+0.02 = 0.781
P/H = 0.765 C/H = 0.210
Vol./W^3 = 0.393

Addition # 5 – NOTE:P1 and all of the girdle facets will meet EXCEPT at the corners. This is not all that easy to cut, be sure your L/W is correct. This is 75.7% in Quartz, and works well in Zircon (88.1%).

 


Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

Gram Faceting Archive of Information
This edited version of an article by the late Jeff Graham is part of a special archived informational series from Gram Faceting. Used with permission.