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

Spin V (QTZ45.JRG)
By Jeff R. Graham
Copyright 1995
65% Light Return
Angles for R.I. = 1.54
37 facets + 6 facets on girdle = 43
6-fold symmetry
96 index
L/W = 1.155 T/W = 0.458 T/L = 0.397
P/W = 0.475 C/W = 0.276
H/W = (P+C)/W+0.02 = 0.771
P/H = 0.616 C/H = 0.358
Vol./W^3 = 0.297

Addition # 2 - Don't let the low ray trace fool you, this design cuts a very bright stone. There is a lot of dispersion going on in this stone. The pattern is nice and as the stone is rocked, it flashes out near the girdle. I like to cut it when I want something that's fast and easy. Any material works, but I prefer light colors, 1-12cts. This works in man-made materials. Cut in refractive indexes 1.54 to 2.14 (71%) with no changes.

 

 

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