Not: Faceting Design Diagram
Successful tips, details, and a guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Not".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
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
PAVILION
CROWN
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.
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
