Faceting Design Diagram: Classic I – Tourmaline – Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite


Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)

Classic I (MC26.JRG) Tourmaline cut by Tony Carson
By Jeff R. Graham
Copyright 1999
88.6% Light Return
Angles for R.I. = 1.62
49 facets + 12 facets on girdle = 61
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.558 T/L = 0.558
P/W = 0.442 C/W = 0.164
H/W = (P+C)/W+0.02 = 0.626
P/H = 0.706 C/H = 0.262
Vol./W^3 = 0.252

Addition # 4 – This is one of my favorites to cut, it is fast and easy. Also this is such a classic shape most jewelers love to use it, and more important buy it. It works in any decent rough, 1cts+. Cut this in R.I. 1.62 to 2.14 (87%) without changes.


Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler