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


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

Antwerp (CHECK57.JRG)
By Jeff R. Graham
Copyright 2003
84.6% Light Return
Angles for R.I. = 1.54
35 facets + 8 facets on girdle = 43
2-fold, mirror-image symmetry
96 index
L/W = 1.500 T/W = 0.500 T/L = 0.334
P/W = 0.451 C/W = 0.234
H/W = (P+C)/W+0.02 = 0.705
P/H = 0.640 C/H = 0.332
Vol./W^3 = 0.543

Addition # 8 – Cut in refractive indexes 1.54 to 2.14 with no changes. This works well in about any material and is quite good for closed “c” axis Tourmaline.


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.