Ojo: 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 "Ojo".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Ojo (MC109.JRG)
By Jeff R. Graham
Copyright 2006
84.7% Light Return
Angles for R.I. = 1.62
125 facets + 16 facets on girdle = 141
2-fold, mirror-image symmetry
96 index
L/W = 1.172 T/W = 0.533 T/L = 0.455 P/W = 0.514
C/W = 0.188 H/W = (P+C)/W+0.02 = 0.722 P/H = 0.712 C/H = 0.261 Vol./W^3 = 0.315
PAVILION
CROWN
Addition # 12 - Cut in refractive indexes 1.62 to 2.14 with no changes. This works best in light to medium saturations and is designed for a large stone.
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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