This unique Concrete Rock Ring is made of high-density concrete and stainless steel by 22 Designstudio.

The concrete ring is a ring with life. Because of the material character, the colour of the concrete ring will become deeper and brighter the more it’s touched. And it may develop some cracks and chips, reflecting the habits of the ring’s owner. It is unique every day, even every moment.

Priced at $103.

[via LikeCool]