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
81.6% Light Return
Angles for R.I. = 1.62
53 facets + 12 facets on girdle = 65
4-fold, mirror-image symmetry
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
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