Faceting Design Diagram: Diag-nal 1.50 – Reflector – Quartz – Citrine, Amethyst, Ametrine, Smokey, Rose


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

Diag-nal 1.50 – Reflector (MC14.JRG) Amethyst
By Jeff R. Graham
Copyright 1999
89.4% Light Return
Angles for R.I. = 1.54
15 facets + 4 facets on girdle = 19
2-fold symmetry
96 index
L/W = 1.500 T/W = 0.856 T/L = 0.571
P/W = 0.500 C/W = 0.338
H/W = (P+C)/W+0.02 = 0.858
P/H = 0.582 C/H = 0.39
Vol./W^3 = 0.767

Addition # 4 – This is another neat flash, the shapes are diamonds. It is easy and fast to cut and makes a nice color flash stone. I like it in a larger size (6x9mm and up) and about any color. 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.