Agate Eye - Sterling Silver Necklace

I'm just calling this an agate eye, because it looks like one, almost. I don't know exactly what type or where this came from. The patterns turned out so nice when I was cutting it!

I've paired the agate with a clear, sparkly CZ (cubic zirconium). I appreciate the affordability of these stones.

The pendant itself is about 1-1/2" long by about 3/4" at the widest. The sterling chain is 16" in length. I've oxidized the chain and then sanded to a satin finish, to give it a little bit of depth.
(Item #P1346)