"S" Hex: Faceting Design Diagram
Details and information on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts and facets suitable for different gems.0
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
"S" Hex (TLINE10.JRG)
By Jeff R. Graham
83.2% Light Return
Angles for R.I. = 1.62
49 facets + 6 facets on girdle = 55
6-fold, mirror-image symmetry
L/W = 1.155 T/W = 0.589 T/L = 0.510
P/W = 0.430 C/W = 0.196
H/W = (P+C)/W+0.02 = 0.647
P/H = 0.665 C/H = 0.304
Vol./W^3 = 0.251
Gram Book 1 - A fairly standard hex to cut, it has a very nice-star-in-a-star flash and a good light return. Any material in light to medium color is good, I cut this quite often, because Tourmaline crystals are often this shape. Cut in refractive index 1.62 to 2.14 (84.8%) with no changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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