[Rockhounds] Fw: green obsidian

[Carol Carter-Wientjes]

On my visit to Oregon this fall I purchased a couple small chunks of Burns 
green from Digger Don's in Roseburg. They're weathered black on the outside 
and a beautiful army green on the inside. Made a nice jewelry carving from a 
piece of it & if anybody wants to see, just email me.

Kinda wondered if that yellow obsidian was glass that somebody was making a 
stretch with in hopes of making a sale...and probably will!

While we're on the topic of obsidian, what's the difference between man-made 
glass and natural glasses like obsidian, moldavite, tektites?, others?

CaroL, rocks on the brain like usual  :-)