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


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

Jeff Graham Facet Design Jeff Graham Facet Design

Magma (MIR69.JRG)
By Jeff R. Graham
Copyright 2005
91% Light Return
Angles for R.I. = 1.54
45 facets + 8 facets on girdle = 53
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.237 T/L = 0.237 P/W = 0.420
C/W = 0.244 H/W = (P+C)/W+0.02 = 0.684 P/H = 0.614 C/H = 0.357 Vol./W^3 = 0.221

Addition # 10 – Cut in refractive indexes 1.54 to 2.14 with no changes. This is fairly easy to cut and has distinct flower-like reflections. Cut in light to medium saturations and I like it cut in 8mm or larger stones.

Jeff Graham Facet Design

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.