Bygone Era: Faceting Design Diagram

Detailed information and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Bygone Era".


Sunstone (Feldspar, Bytonite, Labradorite, Spectrolite, Orthoclase)

Bygone Era Jeff Graham Facet Design

Bygone Era Jeff Graham Facet Design

Bygone Era (SUN26.JRG)
By Jeff R. Graham
Copyright 2006
80.6%Light Return
Angles for R.I. = 1.54
57 facets + 8 facets on girdle = 65
8-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.489 T/L = 0.489 P/W = 0.697
C/W = 0.206 H/W = (P+C)/W+0.02 = 0.923 P/H = 0.755 C/H = 0.223 Vol./W^3 = 0.391



Addition # 11 - Cut in refractive indexes 1.54 to 2.14 with no changes. This is designed for light colored rough, and is very good in Aquamarine. This is fairly fast and easy to cut. This can be cut to the girdle instead of center point to save rough.

Bygone Era Jeff Graham Facet Design

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

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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