Maya: Faceting Design Diagram
Successful tips, details, and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Maya".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
By Jeff R. Graham
77% Light Return
Angles for R.I. = 1.62
73 facets + 8 facets on girdle = 81
4-fold, mirror-image symmetry
L/W = 1.000 T/W = 0.508 T/L = 0.508
P/W = 0.463 C/W = 0.232
H/W = (P+C)/W+0.02 = 0.715
P/H = 0.648 C/H = 0.324
Vol./W^3 = 0.270
Addition # 1 - This design cuts fairly easy, the only thing different about it is the C4 facets. Cut the steps carefully and you won't have any problems. Cut in refractive indexes 1.62 to 1.76 with no changes. Cut in light to medium material. This design will help improve light material, 1-8cts.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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