I am fairly sure that this is a man-made composite stone. It's very striking; looks like turquoise with shards of copper embedded in it. This piece has a fairly open frame, and lots of "drama" under the bail.
Comes with a 24" faux-copper chain.
Gold Copper Bornite
Tallest & widest dimensions
2 7/8" x 1 3/8"
About the copper
Antiqued, polished and sealed. Will not darken further or rub off on skin. No polishing needed.