Jerico: Faceting Design Diagram
Successful tips, details, and guide on Faceting Designs. Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Jerico".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Jerico (MIR57.JRG)
By Jeff R. Graham
Copyright 2005
89.3% Light Return
Angles for R.I. = 1.62
41 facets + 8 facets on girdle = 49
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.250 T/L = 0.250 P/W = 0.466
C/W = 0.205 H/W = (P+C)/W+0.02 = 0.692 P/H = 0.674 C/H = 0.297 Vol./W^3 = 0.259
PAVILION
CROWN
Addition # 10 - Cut in refractive indexes 1.62 to 1.93 with no changes. This has a lot of reflections in it and works best in a large stone with light saturation. This is quick and easy to cut. It is great for large earrings.
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
