Tabish: 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 "Tabish".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Tabish (CHECK26.JRG)
By Jeff R. Graham
Copyright 2001
93% Light Return
Angles for R.I. = 1.62
39 facets + 12 facets on girdle = 51
2-fold, mirror-image symmetry
96 index
L/W = 1.163 T/W = 0.211 T/L = 0.182
P/W = 0.450 C/W = 0.230
H/W = (P+C)/W+0.02 = 0.700
P/H = 0.643 C/H = 0.328
Vol./W^3 = 0.306
Addition # 6 - Notice that the ends float, P6 does not cut to center point. Make the girdle facets as equal as you can, but the stone can be varied L/W without causing much problem. This can be cut in refractive indexes 1.62 to 1.93 with no changes. This design makes a very bright stone and works well in darker materials.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
