Atlas: Faceting Design Diagram
Detailed information and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Atlas".
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Atlas (MC65.JRG)
By Jeff R. Graham
Copyright 2002
87.6% Light Return
Angles for R.I. = 1.62
57 facets + 12 facets on girdle = 69
2-fold, mirror-image symmetry
96 index
L/W = 1.330 T/W = 0.598 T/L = 0.449
P/W = 0.555 C/W = 0.230
H/W = (P+C)/W+0.02 = 0.804
P/H = 0.690 C/H = 0.286
Vol./W^3 = 0.400
Addition # 7 - This is great for medium saturated materials. It works well in Garnet, Sapphire and man-made materials with no changes. Note: I rough in P1, P2, P3 at 41.64 and then cut the other angles on a finer lap.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
