Plus Six: 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 "Plus Six".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Plus Six (CHECK2.JRG)
By Jeff R. Graham
Copyright 2001
90.2 % Light Return
Angles for R.I. = 1.62
23 facets + 6 facets on girdle = 29
6-fold, mirror-image symmetry
96 index
L/W = 1.155 T/W = 0.280 T/L = 0.243
P/W = 0.405 C/W = 0.181
H/W = (P+C)/W+0.02 = 0.606
P/H = 0.668 C/H = 0.299
Vol./W^3 = 0.232
Addition # 6 - This was designed for a rather large piece of Nigerian Tourmaline that I wanted to cut. The stone was six-sided with Rubellite outside with a peach center. I wanted something that would be bright and show off the unusual quality of the rough. I prefer checkerboards for material that is saturated and here is what I came up with. This works well in Garnet, darker Sapphire and most man-made materials.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
