Diamond Star : Faceting Design Diagram
Detailed information and guide on Faceting Designs. Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Diamond Star".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Diamond Star (CHECK31.JRG)
By Jeff R. Graham
87% Light Return
Angles for R.I. = 1.62
49 facets + 6 facets on girdle = 55
16-fold, mirror-image symmetry
L/W = 1.143 T/W = 0.321 T/L = 0.281
P/W = 0.517 C/W = 0.193
H/W = (P+C)/W+0.02 = 0.730
P/H = 0.709 C/H = 0.264
Vol./W^3 = 0.257
Addition # 6 - L/W is critical on this one, otherwise the diamonds on the top can be a pain to line up. Other than that it cuts easily and is a very unusual design.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
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