Faceting Design Diagram: Keen Glitter – Peridot


Peridot

Keen Glitter Jeff Graham Facet Design Keen Glitter Jeff Graham Facet Design

Keen Glitter (MC119.JRG)
By Jeff R. Graham
Copyright 2006
83% Light Return
Angles for R.I. = 1.67
115 facets + 15 facets on girdle = 130
3-fold, mirror-image symmetry
96 index
L/W = 1.030 T/W = 0.360 T/L = 0.350 P/W = 0.482
C/W = 0.204 H/W = (P+C)/W+0.02 = 0.706 P/H = 0.683 C/H = 0.289 Vol./W^3 = 0.266

Addition # 12 – Cut in refractive indexes 1.67 to 2.14 with no changes. This is designed for Peridot and will work well in about any light to medium saturated material. It is not hard to cut and works best in a large stone.

Keen Glitter 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.