The listing, Brown Agate Silver Ring Size 8 - 8 1/2 has ended.
I don't know a lot about this ring. I bought it at one of those street fairs from a guy who makes jewelry out of different stones. It is pretty heavy, possibly sterling silver, but I don't see any stamp (whatever it is, it won't turn your finger green). Could be cool for a guy or lady who is used to wearing heavier stones on their hands. The rock on it I think is some sort of agate bead. Size is between 8 and 8 1/2.