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


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

Spiral Sun

Jeff Graham Facet Design

Spiral Sun (MIR66.JRG)
By Jeff R. Graham
Copyright 2005
91.9% Light Return
Angles for R.I. = 1.54
33 facets + 8 facets on girdle = 41
8-fold symmetry
96 index
L/W = 1.000 T/W = 0.367 T/L = 0.367 P/W = 0.435 C/W = 0.240 H/W = (P+C)/W+0.02 = 0.695 P/H = 0.625 C/H = 0.346 Vol./W^3 = 0.241

Addition # 10 – This is another good earring design for lightly saturated materials. This is easy and fast to cut. I like it in Rose de France. Cut in refractive indexes 1.54 to 2.14 with not changes.

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.