Bird Nest Necklaces and Etched Metal

Etched, stamped and cold connected metal pieces with a bit of lampworked glass beads and wire wrap.

i WisH...

I wish I had more time to play...

What type of stone is this?

Made this one a while ago. My first attempt at seed beading. It's an etched lampwork bead, but looks very stone like. The necklace is kumihimo hand braided cotton.