Odd Round n’ Round: Faceting Design Diagram
Successful Tips and guide on Faceting Designs. Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Odd Round n' Round"
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Odd Round n' Round (TLINE1.JRG)
By Jeff R. Graham
Copyright 1993
83.4% Light Return
Angles for R.I. = 1.62
129 facets + 16 facets on girdle = 145
8-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.489 T/L = 0.489
P/W = 0.426 C/W = 0.157
H/W = (P+C)/W+0.02 = 0.603
P/H = 0.707 C/H = 0.260
Vol./W^3 = 0.217
Addition # 2 - This design is for light to med material, 1-16cts. It has a nice uneven sparkle in every direction and is fun to cut because of it's odd symmetry. Cut in refractive indexes 1.54 to 2.14 (91.4%) with no changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
