Quartz (Amethyst, Citrine, Ametrine, Smokey, Rose)

Square's Rule (MIR55.JRG)
By Jeff R. Graham
Copyright 2005
81.3% Light Return
Angles for R.I. = 1.54
25 facets + 4 facets on girdle = 29
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.209 T/L = 0.209 P/W = 0.435
C/W = 0.256 H/W = (P+C)/W+0.02 = 0.711 P/H = 0.611 C/H = 0.360 Vol./W^3 = 0.295

Addition # 10 - Note: The C3 can vary, but I like to cut it so that the C2 tier facets are as straight as possible. Cut this in refractive indexes 1.54 to 2.14 with no changes. Light to medium saturated stones work best.

 

 

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