Onyx Moldings and Liners Onyx tile moldings come in a variety of interesting colors and patterns. Plain tiles in a solid color make a bold statement when combined with accents in complementary shades. The molding ties the space together or can be used by a designer to add a beautiful design accent to the room. Deciding which tile molding you should use is an important part of the design process. Come into our design showroom and discuss your needs with our expert staff.