This had a label on it that said "Stone Semi-Prec Tumbled" And unfortunately, that is the extent of my knowledge on what this stone is.
I think it is smokey quartz. I can't verify it though.
It's beautiful. That is what I can tell you. A very dark stone with small striations of grey on the very top and bottom. Smooth and inviting you to touch, it would make an excellent worry stone.
The metal bail is silver color with a pattern embossed on it's surface. There is a very small amount of wear in the stone around the bail hole.
Smoke free studio.
With the bail the pendant measures about 2 3/8 inches 6cm. Without the bail the stone itself is 1 1/8 inch or 28mm wide and roughly 1 1/2 inches or 38mm in length.
This would work well in a design for either men or women.