4X Square: Faceting Design Diagram
Detailed information and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "4X Square"
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
4X Square (TLINE12.JRG)
By Jeff R. Graham
Copyright 1994
81.6% Light Return
Angles for R.I. = 1.62
53 facets + 12 facets on girdle = 65
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.479 T/L = 0.479
P/W = 0.450 C/W = 0.198
H/W = (P+C)/W+0.02 = 0.669
P/H = 0.673 C/H = 0.297
Vol./W^3 = 0.267
Gram Book 1 - Here is a nice modified square that cuts fast and has a very nice flash. It can be cut in about any size or material, 1/2-6cts. Cut in refractive index 1.62 to 2.14 (83.8%) with no changes.
Random - Cosine - ISO
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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