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

Double Cross Square (QTZ7.JRG)
By Jeff R. Graham
Copyright 1993
75% Light Return
Angles for R.I. = 1.54
73 facets + 8 facets on girdle = 81
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.594 T/L = 0.594
P/W = 0.529 C/W = 0.212
H/W = (P+C)/W+0.02 = 0.761
P/H = 0.695 C/H = 0.278
Vol./W^3 = 0.363

Gram Book 1 - This design is not as hard to cut as it might look. It is different to cut and it's deep to help darken light to medium material, 1-8cts. As on all of my designs, if you see a better way to cut it feel free. Cut in refractive index 1.54 to 2.14 (85.1%) with no changes.

 

 

 

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