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


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

Antwerp Brilliant (CHECK84.JRG)
By Jeff R. Graham
Copyright 2002
88% Light Return
Angles for R.I. = 1.54
49 facets + 8 facets on girdle = 57
2-fold, mirror-image symmetry
96 index
L/W = 1.331 T/W = 0.461 T/L = 0.346
P/W = 0.639 C/W = 0.221
H/W = (P+C)/W+0.02 = 0.880
P/H = 0.726 C/H = 0.252
Vol./W^3 = 0.497

Addition # 8 – Cut in refractive indexes 1.54 to 2.14 with no changes. I like this in about any material, it is especially nice in medium colored materials.


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.