Successful tips and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Nifty Swifty".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Nifty Swifty (CHECK61.JRG)
By Jeff R. Graham
Copyright 2003
88.1% Light Return
Angles for R.I. = 1.62
41 facets + 8 facets on girdle = 49
2-fold, mirror-image symmetry
96 index
L/W = 1.500 T/W = 0.495 T/L = 0.330
P/W = 0.437 C/W = 0.172
H/W = (P+C)/W+0.02 = 0.629
P/H = 0.694 C/H = 0.274
Vol./W^3 = 0.345
Addition # 8 - This works well in almost any Tourmaline. You may need to adjust the crown a bit depending on how you cut in C6. Hint: Leave C3 at a higher angle, cut the crown and then take up the slack if any.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Pei, lasr
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Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Nifty Swifty (CHECK61.JRG)
By Jeff R. Graham
Copyright 2003
88.1% Light Return
Angles for R.I. = 1.62
41 facets + 8 facets on girdle = 49
2-fold, mirror-image symmetry
96 index
L/W = 1.500 T/W = 0.495 T/L = 0.330
P/W = 0.437 C/W = 0.172
H/W = (P+C)/W+0.02 = 0.629
P/H = 0.694 C/H = 0.274
Vol./W^3 = 0.345
Addition # 8 - This works well in almost any Tourmaline. You may need to adjust the crown a bit depending on how you cut in C6. Hint: Leave C3 at a higher angle, cut the crown and then take up the slack if any.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Pei, lasr
