In deeper water, where the light thins out, great star coral turns cooler and greyer, and its raised cups start to look less like decoration and more like architecture. The Pewter Blue Great Star takes that deeper-water look and puts it on a wall. At 4.5 inches across and 2 inches deep, this ceramic star wears a grey-leaning blue named for the metal, with a ring of raised cups around a central star. It hangs from one screw and asks for nothing else. It suits rooms that already prefer to keep their voices down.