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Quartz (Amethyst, Citrine, Ametrine, Smokey, Rose)
Purdy Girdle (BEAD36.JRG)
By Jeff R. Graham
Copyright 2007
Angles for R.I. = 1.54
160 facets + 16 facets on girdle = 176
16-fold, mirror-image symmetry
96 index
L/W = 1.000
P/W = 0.688 C/W = 0.688
H/W = (P+C)/W+0.02 = 1.396
P/H = 0.493 C/H = 0.493
Vol./W^3 = 0.523
Addition # 14 - Note that this design has a girdle for setting the stone. It can be left off and the bead drilled. This works well in light to medium saturated materials.
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