Faceting Design Diagram: Z-Diamonds – Reflector – Quartz – Citrine, Amethyst, Ametrine, Smokey, Rose


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

Z-Diamonds – Reflector (MC13.JRG)
By Jeff R. Graham
Copyright 1999
90.7% Light Return
Angles for R.I. = 1.54
13 facets + 4 facets on girdle = 17
2-fold symmetry
96 index
L/W = 1.500 T/W = 0.892 T/L = 0.595
P/W = 0.500 C/W = 0.254
H/W = (P+C)/W+0.02 = 0.774
P/H = 0.646 C/H = 0.328
Vol./W^3 = 0.651

Addition # 4 – This is a neat one when it flashes. I find it works well in about any material, I like it in a little bit larger size. It cut easy and fast and is designed to give a nice color flash when rocked on the long axis. It works well in Tourmaline and Topaz. Cut this in R.I. 1.54 to 1.76 without 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.