Zircon (Hyacinth, Starlite)

Plus-X Zircon (ZIRCON13.JRG)
By Jeff R. Graham
Copyright 1994
82.8% Light Return
Angles for R.I. = 1.93
145 facets + 20 facets on girdle = 165
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.433 T/L = 0.433
P/W = 0.440 C/W = 0.218
H/W = (P+C)/W+0.02 = 0.678
P/H = 0.648 C/H = 0.322
Vol./W^3 = 0.277

Addition # 3 - Lots of work, this design is NOT for the timid. It should be cut large in light material. Watch the C11 facets, they are not cut to center point, they meet C9, C10 at the intersect, 2-16cts. CZ will work.

 

 

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