Premium Grade Nero Marquina Marble Penny Round Mosaic Tiles. Black Marquina Marble Polished 1 inch Penny Round Mosaic Wall & Floor Tiles are perfect for any interior projects. The 1 inch Nero Marquina Venato Marble Penny Round Mosaic tiles can be used for a kitchen backsplash, bathroom flooring, shower surround, dining room, entryway, spa. Our timeless Glossy Nero Marquinia Black Marble Penny Round Waterjet Mosaic tiles with a large selection of coordinating products is available and include arabesque, fish scale, penny round, herringbone, basketweave mosaics, 12x12, 18x18, 12x34, subway tiles, moldings, borders, and more.