Step’in Four: Faceting Design Diagram
Successful tips and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Step'in Four".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Step'in Four (MIR81.JRG)
By Jeff R. Graham
87.4% Light Return
Angles for R.I. = 1.62
25 facets + 8 facets on girdle = 33
4-fold, mirror-image symmetry
L/W = 1.000 T/W = 0.257 T/L = 0.257 P/W = 0.466
C/W = 0.182 H/W = (P+C)/W+0.02 = 0.668 P/H = 0.698 C/H = 0.272 Vol./W^3 = 0.252
Addition # 10 - Cut in refractive indexes 1.62 to 1.76 with no changes. This works well in light to medium saturations. I use it for Garnets, particularly for earrings. It's pretty fast and easy to cut. The reflections will surprise you.
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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