Faceting Design Diagram: Spin V – Quartz – Citrine, Amethyst, Ametrine, Smokey, Rose


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.


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.