Well, sorta. It’s not a rock per say, but it’s hard as one. Made of cement and stainless steel (we have no idea how heavy it is), this ring both wears and adjusts color based on the kinds of things the wearer likes to do. Not to mention it’s very unique, very cool and very manly—just like you.

It’s about $100, depending on the exchange rate, which well, we won’t comment on that. See more about it HERE.