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.

Home Learning Center Jewelry and Lapidary Gemstone Faceting Diagrams and Technical Cutting Information12 Glitter: Faceting Design Diagram

By Jeff R. Graham

Peridot

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

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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