Faceting Design Diagram: Keen Glitter – 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

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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