Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Muse (DOME7.JRG)
By Jeff R. Graham
Copyright 2007
84.5% Light Return
Angles for R.I. = 1.62
79 facets + 6 facets on girdle = 85
6-fold, mirror-image symmetry
96 index
L/W = 1.155 T/W = 0.390 T/L = 0.338 P/W = 0.464
C/W = 0.366 H/W = (P+C)/W+0.02 = 0.849 P/H = 0.546 C/H = 0.431 Vol./W^3 = 0.367
PAVILION
CROWN
Addition # 13 – This is pretty simple to cut. Cut in light to medium saturated materials. Cut in refractive indexes 1.62 to 1.93 with no changes.
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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