12 Glitter: Faceting Design Diagram
Details and information on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts and facets suitable for different gems.
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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
PAVILION
CROWN
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.
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
