Faceting Design Diagram: Glitter Mine #3 – Peridot


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Glitter Mine#3 Jeff Graham Facet Design Glitter Mine#3 Jeff Graham Facet Design

Glitter Mine #3 (MC95.JRG)
By Jeff R. Graham
Copyright 2006
78% Light Return
Angles for R.I. = 1.67
105 facets + 8 facets on girdle = 113
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.395 T/L = 0.395 P/W = 0.513
C/W = 0.262 H/W = (P+C)/W+0.02 = 0.795 P/H = 0.645 C/H = 0.330 Vol./W^3 = 0.316

Addition # 12 – Cut in refractive indexes 1.67 to 2.14 with no changes. This works well in light to medium saturations and is very nice in light colored Zircons.

Glitter Mine#3 Jeff Graham Facet Design

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.