Faceting Design Diagram: Singular 7 – Quartz – Citrine, Amethyst, Ametrine, Smokey, Rose


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

Singular 7 (MIR33.JRG)
By Jeff R. Graham
Copyright 2004
94.4% Light Return
Angles for R.I. = 1.54
57 facets + 7 facets on girdle = 64
7-fold symmetry
77 index
L/W = 1.026 T/W = 0.299 T/L = 0.291
P/W = 0.431 C/W = 0.188
H/W = (P+C)/W+0.02 = 0.639
P/H = 0.675 C/H = 0.294
Vol./W^3 = 0.195

Addition # 9 – This is quite interesting and not difficult to cut. It works well in any material. I like it in Garnets. Cut in refractive indexes 1.54 to 2.14 with no changes. This is a bright design and has a ton of sparkle.


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.