8-Swirl: 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 "8-Swirl"0
Garnet (Pyrope, Rhodolite, Almandine, Spessartite, Grossular, Demantoid, Tsavorite)
By Jeff R. Graham
90.9% Light Return
Angles for R.I. = 1.78
57 facets + 8 facets on girdle = 65
L/W = 1.000 T/W = 0.403 T/L = 0.403
P/W = 0.375 C/W = 0.141
H/W = (P+C)/W+0.02 = 0.536
P/H = 0.699 C/H = 0.263
Vol./W^3 = 0.198
Gram Book 1 - A nice design for colored Garnet (notice the 1.78 R.I). It is a little different to cut. The facets cut fast, watch out. I prefer this design in a light Garnet like a Mali. Cut in refractive index 1.78 to 2.14 (92.6%) with no changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
Garnet Value, Price, and Jewelry Information
How Do Garnets Form?
Top Spots for Gem Hunting in the US
Crystalline Quartz Buying Guide
How Does Vapor Deposition Create Mystic Topaz and Aqua Aura Quartz?
Spurrite Value, Price, and Jewelry Information
Lapidary Technology Through the Ages: Laps and Polish
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!