Old Style 2: 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 "Old Style 2".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Old Style 2 (TLINE63.JRG)
By Jeff R. Graham
86% Light Return
Angles for R.I. = 1.62
73 facets + 8 facets on girdle = 81
4-fold, mirror-image symmetry
L/W = 1.000 T/W = 0.458 T/L = 0.458
P/W = 0.417 C/W = 0.166
H/W = (P+C)/W+0.02 = 0.603
P/H = 0.692 C/H = 0.275
Vol./W^3 = 0.202
Addition # 2 - The crown on this design can be hard to cut. The C5,C6 tiers are close and can be tough to get right. The P5 tier is not center point, cut it until the P4 are just tapered, any material, 1-18cts. Cut in refractive indexes 1.62 to 1.76 with no changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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