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


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

Astor Star (MC63.JRG)
By Jeff R. Graham
Copyright 2002
89.2% Light Return
Angles for R.I. = 1.54
49 facets + 8 facets on girdle = 57
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.472 T/L = 0.472
P/W = 0.537 C/W = 0.202
H/W = (P+C)/W+0.02 = 0.759
P/H = 0.708 C/H = 0.266
Vol./W^3 = 0.339

Addition # 7 – This is my take on an old fashioned square emerald cut. This works very well in almost any material but particularly well in light colored materials. Cut this in refractive indexes 1.54 to 2.14 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.