Viking’s Luck: 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 "Viking's Luck".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Viking's Luck (CHECK71.JRG)
By Jeff R. Graham
82.7% Light Return
Angles for R.I. = 1.62
47 facets + 8 facets on girdle = 55
2-fold, mirror-image symmetry
L/W = 1.602 T/W = 0.515 T/L = 0.322
P/W = 0.436 C/W = 0.262
H/W = (P+C)/W+0.02 = 0.717
P/H = 0.607 C/H = 0.365
Vol./W^3 = 0.516
Addition # 8 - This is not very easy to cut, but after you have done it once, it's not hard the next time. The L/W is not critical but should be close. Cut In refractive indexes 1.62 tp 2.14 with no changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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