Faceting Design Diagram: Kashmire 1.33 – Sapphire / Corundum – Ruby, Ceylon, Padparadschah, Pink, Yellow, Green


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

Kashmire 1.33 (MC64.JRG)
By Jeff R. Graham
Copyright 2002
83% Light Return
Angles for R.I. = 1.76
81 facets + 16 facets on girdle = 97
2-fold, mirror-image symmetry
120 index
L/W = 1.328 T/W = 0.632 T/L = 0.476
P/W = 0.562 C/W = 0.179
H/W = (P+C)/W+0.02 = 0.761
P/H = 0.738 C/H = 0.235
Vol./W^3 = 0.349

Addition # 7 – For an oval, this is pretty easy to cut . It is designed for re-cutting native cut Sapphire ovals. It is L/W=1.33 and it is a good idea to check the L/W when you cut the girdle.


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.