Faceting Design Diagram: Double Cross Square – Quartz – Citrine, Amethyst, Ametrine, Smokey, Rose


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.


Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

Gram Faceting Archive of Information
This edited version of an article by the late Jeff Graham is part of a special archived informational series from Gram Faceting. Used with permission.