“Streeech” : Faceting Design Diagram
Successful tips, details and guide on Faceting Designs. Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Streeech"0
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
By Jeff R. Graham
72% Light Return
Angles for R.I. = 1.62
29 facets + 4 facets on girdle = 33
2-fold, mirror-image symmetry 96 index
L/W = 3.000 T/W = 2.394 T/L = 0.798
P/W = 0.557 C/W = 0.259
H/W = (P+C)/W+0.02 = 0.836
P/H = 0.666 C/H = 0.310
Vol./W^3 = 1.362
Addition # 3 - Cut a 3.0 L/W preform. I get tired of cutting steps in long Tourmaline crystals, so here is what I do. The crown can be cut as low as 32 (subtract 10 from each of the crown tiers). Open "c" is best, 1-18cts.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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