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

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

Turban (B18.JRG)
By Jeff R. Graham
Copyright 2001
86% Light Return
Angles for R.I. = 1.76
51 facets + 12 facets on girdle = 63
2-fold, mirror-image symmetry
96 index
L/W = 1.492 T/W = 0.908 T/L = 0.609
P/W = 0.649 C/W = 0.170
H/W = (P+C)/W+0.02 = 0.839 P/H = 0.774
C/H = 0.203 Vol./W^3 = 0.435

Updated August 2003

Addition # 5 – This is a nice stone and should be cut in light colored material, it is really a “Money Cut”. It works well for Zircon and light Garnet (like mint). I actually designed it for light Garnet, they are seldom large, but I wanted a Barion that would help increase the color and dispersion. Notice the low number of actual facets, it is designed for smaller stones. Man-made material works well as long as it is not dark. A L/W 1.49 is a good idea, if you are off the breaks will look stair stepped at the girdle. NOTE: Cut the table then C8 to meet.

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.