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".
Tut's Pyramid (CHECK19.JRG)
By Jeff R. Graham
81.8% Light Return
Angles for R.I. = 1.54
43 facets + 6 facets on girdle = 49
3-fold, mirror-image symmetry
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
Rose Quartz Value, Price, and Jewelry Information
Ametrine Value, Price, and Jewelry Information
Amethyst Value, Price, and Jewelry Information
Citrine Value, Price, and Jewelry Information
Rubellite Tourmaline Value, Price, and Jewelry Information
Ten Rare and Expensive Engagement Ring Stones
Eight Famous Sapphires and the Stories Behind Them
How to Dry Opals Safely
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
Get started with the International Gem Society’s free guide to gemstone identification. Join our weekly newsletter & get a free copy of the Gem ID Checklist!