Faceting Design Diagram: Square’s Rule – Quartz – Citrine, Amethyst, Ametrine, Smokey, Rose

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

Jeff Graham Facet Design

Square’s Rule (MIR55.JRG)
By Jeff R. Graham
Copyright 2005
81.3% Light Return
Angles for R.I. = 1.54
25 facets + 4 facets on girdle = 29
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.209 T/L = 0.209 P/W = 0.435
C/W = 0.256 H/W = (P+C)/W+0.02 = 0.711 P/H = 0.611 C/H = 0.360 Vol./W^3 = 0.295


Addition # 10 Note: The C3 can vary, but I like to cut it so that the C2 tier facets are as straight as possible. Cut this in refractive indexes 1.54 to 2.14 with no changes. Light to medium saturated stones work best.

Square's Rule_facet_Design_2

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.
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