Faceting Design Diagram: Lion’s Eye – Peridot


Peridot

Lions Eye Jeff Graham Facet Design  Lions Eye_jeff_graham_facet_design3

Lion’s Eye (MC116.JRG)
By Jeff R. Graham
Copyright 2006
74.7% Light Return
Angles for R.I. = 1.67
181 facets + 16 facets on girdle = 197
2-fold, mirror-image symmetry
96 index
L/W = 1.268 T/W = 0.432 T/L = 0.341 P/W = 0.643
C/W = 0.315 H/W = (P+C)/W+0.02 = 0.978 P/H = 0.658 C/H = 0.322 Vol./W^3 = 0.504

Addition # 12 – Cut this in refractive indexes 1.67 to 2.14 with no changes. This is difficult to cut, I designed it for a large piece of Peridot. P11,C5, just cut to center point, make sure you have the rough because it makes life much easier.

Lions Eye_jeff_graham_facet_design2

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.