Posted 10 years ago
This bead was not a 'tradebead but a 'madebead, I like to say
It is stone, steadtite or magnesite? I'm not sure.
If you look close you can see the marks made when it was ground, drilled and polished by hand.
It was drilled from both sides
Upon closer examination you can see in the center evidence of the drilling process. Marks resemble threads on a nut/bolt.
Method/technic used "bow " in my opinion.