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


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

Flipper (SAP18.JRG)
By Jeff R. Graham
Copyright 1998
76% Light Return
Angles for R.I. = 1.76
65 facets + 8 facets on girdle = 73
2-fold, mirror-image symmetry
96 index
L/W = 1.330 T/W = 0.845 T/L = 0.635
P/W = 0.382 C/W = 0.182
H/W = (P+C)/W+0.02 = 0.584
P/H = 0.654 C/H = 0.312
Vol./W^3 = 0.259

Addition # 2 – This is medium-hard to cut. It works well in sapphire and is a nice change from an oval, which I always seem to have rough to cut in (that shape). A preform is a help and roughing in the table helps too. This works well in man-made Sapphire and Spinels


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.