Zircon (Hyacinth, Starlite)
Turbo Glitter (MC118.JRG)
By Jeff R. Graham
Copyright 2006
80.8% Light Return
Angles for R.I. = 1.93
99 facets + 12 facets on girdle = 111
2-fold, mirror-image symmetry
96 index
L/W = 1.152 T/W = 0.881 T/L = 0.765 P/W = 0.575
C/W = 0.144 H/W = (P+C)/W+0.02 = 0.738 P/H = 0.778 C/H = 0.195 Vol./W^3 = 0.320
PAVILION
CROWN
Addition # 2 – Cut in refractive indexes 1.93 to 2.14 with no changes. This is designed for Zircons, but it works reasonably well in R.I. 1.67 to 1.93. Note: The L/W can be left a little long and then cut in to match.
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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