Tut’s Pyramid: Faceting Design Diagram
Successful tips and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Tut's Pyramid".
Quartz (Amethyst, Citrine, Ametrine, Smokey, Rose)
Tut's Pyramid (CHECK19.JRG)
By Jeff R. Graham
Copyright 2001
81.8% Light Return
Angles for R.I. = 1.54
43 facets + 6 facets on girdle = 49
3-fold, mirror-image symmetry
96 index
L/W = 1.155 T/W = 0.318 T/L = 0.276
P/W = 0.484 C/W = 0.217
H/W = (P+C)/W+0.02 = 0.720
P/H = 0.672 C/H = 0.301
Vol./W^3 = 0.287
Addition # 6 - Can be cut in refractive indexes 1.54 to 1.93 (89.1%)with no changes. Tourmaline is 84.7%, Zircon is 89.1%… Basically, the dark bars out near the corners just go away as the R.I. goes up. I left this in Quartz because it cuts a nice stone.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
