Sapphire “RB.v” : Faceting Design Diagram

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

Sapphire "RB.v" (SAP16.JRG)
By Jeff R. Graham
Copyright 1998
86% Light Return
Angles for R.I. = 1.76
73 facets + 16 facets on girdle = 89
8-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.498 T/L = 0.498
P/W = 0.434 C/W = 0.214
H/W = (P+C)/W+0.02 = 0.668
P/H = 0.649 C/H = 0.321
Vol./W^3 = 0.220

Addition # 2 - This is pretty standard, I did it because I had a lot of people ask me for a little different round in Sapphire. Any light to medium material, 1-8cts. Cut in refractive indexes 1.54 (71%) to 2.14 (89.6%) with no changes.

Random - Cosine - ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler