Tut’s Pyramid: Faceting Design Diagram

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