Faceting Design Diagram: 12 Glitter – Peridot


Peridot

12 Glitter Jeff Graham Facet Design12 Glitter Jeff Graham Facet Design

12 Glitter (MC92.JRG)
By Jeff R. Graham
Copyright 2006
80.6% Light Return
Angles for R.I. = 1.67
121 facets + 12 facets on girdle = 133
12-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.382 T/L = 0.382 P/W = 0.465
C/W = 0.243 H/W = (P+C)/W+0.02 = 0.728 P/H = 0.639 C/H = 0.334 Vol./W^3 = 0.281

 

Addition # 12 – Cut in refractive indexes 1.67 to 2.14 with no changes. This is fun to cut and is 12 sided which is a little unusual. It works well in any light to medium saturated material. Note: The girdle can be cut first then meet P1 to it to save rough.

12 Glitter Jeff Graham Facet Design

Detailed faceting instructions by Jeff Graham available at The Rock Peddler