Trough 4819 Sink by Native Trails.
Award-winning Trough 4819 concrete bathroom sink is handcrafted of an innovative, remarkably strong blend of cement and jute fiber that is surprisingly lightweight for concrete, extraordinarily heavy-duty in the bathroom and refreshingly easy when it comes to clean-up. Available in three finishes: Ash, Slate and Pearl.
Link to the manufacturer : www.nativetrails.net