Faceting Design Diagram: Not – Tourmaline, Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite

Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)

Jeff Graham Faceting Design Jeff Graham Faceting Design

Not (MIR70.JRG)
By Jeff R. Graham
Copyright 2005
92.2% Light Return
Angles for R.I. = 1.62
49 facets + 8 facets on girdle = 57
8-fold, mirror-image symmetry
80 index
L/W = 1.000 T/W = 0.396 T/L = 0.396 P/W = 0.426
C/W = 0.204 H/W = (P+C)/W+0.02 = 0.650 P/H = 0.655 C/H = 0.314 Vol./W^3 = 0.230

Addition # 10 – This is easy to cut, but needs to be in a large size,10mm and up. The amount of Mirage reflections in this design are amazing. I designed this to be a fast way to cut large stone. This is “Not” what you think, and it can be a little harder to cut than may think. The P3 tier is a bit difficult depending on the stone size.

Jeff Graham Faceting Design

Detailed faceting instructions by Jeff Graham available at The Rock Peddler