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

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

Phenomenon (MIR16.JRG)
By Jeff R. Graham
Copyright 2004
92.4% Light Return
Angles for R.I. = 1.54
20 facets + 4 facets on girdle = 24
4-fold, mirror-image symmetry
96 index
L/W = 1.000 P/W = 0.435 C/W = 0.234
H/W = (P+C)/W+0.02 = 0.688
P/H = 0.631 C/H = 0.339
Vol./W^3 = 0.270

Addition # 9 – Looks simple? It is and the finished stone is really nice. This is designed for Amethyst, Citrine, and Beryl, in particular, but works well in about any material. Cut in refractive indexes 1.54 to 1.93 with no changes. This is what Mirage Designs are all about, lots of reflections and simple facets.

Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

About the author
Jeff R. Graham
The late Jeff Graham was a prolific faceter, creator of many original faceting designs, and the author of several highly-regarded instructional faceting books such as Gram Faceting Designs.
All articles by this author