Octagon Lace: Faceting Design Diagram
Tips, details, and a guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Octagon Lace".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Octagon Lace (MIR59.JRG)
By Jeff R. Graham
91% Light Return
Angles for R.I. = 1.62
49 facets + 8 facets on girdle = 57
8-fold, mirror-image symmetry
L/W = 1.000 T/W = 0.246 T/L = 0.246 P/W = 0.438
C/W = 0.209 H/W = (P+C)/W+0.02 = 0.667 P/H = 0.657 C/H = 0.313 Vol./W^3 = 0.243
Addition # 10 - This is fun and easy to cut. Note: The P3 tier cuts through the girdle line. When you cut the C1 just leave enough so that the points are not fragile. This design has a very interesting and unique pattern. I like in about any saturation. Cut in refractive indexes 1.62 to 2.14 with no changes.
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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