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


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

Diamonds Up (CHECK21.JRG)
By Jeff R. Graham
Copyright 2001
80.5% Light Return
Angles for R.I. = 1.54
81 facets + 16 facets on girdle = 97
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.394 T/L = 0.394
P/W = 0.528 C/W = 0.180
H/W = (P+C)/W+0.02 = 0.727
P/H = 0.725 C/H = 0.247
Vol./W^3 = 0.295

Addition # 6 – This can be cut in refractive indexes 1.54 to 1.93 with no changes. This should be cut in a light to medium colored material as it will darken a bit.

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.