Used this as trim inside my shower with the marbled pencil trim. I used Carrara porcelain tile. Don't be afraid of mixing materials. This is carrara with ceramic subway tile. The pencil helps deal with the possible thickness differences.
White and gray bathroom boasts a white dual washstand topped with gray quartz fitted with his and her sinks placed under vintage cross handle faucets lining gray subway tiled wall. I like the gray countertop.