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


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

Zip (MC49.JRG)
By Jeff R. Graham
Copyright 2001
89.4% Light Return
Angles for R.I. = 1.54
15 facets + 4 facets on girdle = 19
1-fold symmetry
96 index
L/W = 1.000 T/W = 0.656 T/L = 0.656
P/W = 0.462 C/W = 0.099
H/W = (P+C)/W+0.02 = 0.581
P/H = 0.795 C/H = 0.171
Vol./W^3 = 0.220

Addition # 7 – This is a design made for accent stones. The best way to cut this is to cut a square girdle first. When I say edge on P4(G), I mean cut to the long edge. The best way to do it is cut until the P4(G)just meets 72 index (cutting the pavilion). This is actually pretty easy and works great for 1.54 to 1.93 with no changes. I like it cut in red Garnet.

 


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.