Faceting Design Diagram: Maya – Tourmaline – Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite


Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)

Maya (TLINE32.JRG) 1.29 carat green Tourmaline
By Jeff R. Graham
Copyright 1995
77% Light Return
Angles for R.I. = 1.62
73 facets + 8 facets on girdle = 81
4-fold, mirror-image symmetry
96 index
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