Premium Grade Nero Marquina Black Marble Square Mosaic Tile. Black Marquina Marble Polished 5/8 x 5/8 Mosaic Wall and Floor Tiles are perfect for any residential / commercial projects. The 5/8x5/8 Nero Marquina Venato Marble Square Mosaic Tile can be used for kitchen backsplash, bathroom flooring, shower surround, dining room, entryway, corridor, fireplace hearth floor, spa, etc. Our timeless Glossy Nero Marquinia Black Marble 5/8" x 5/8" Grid Mosaic Tile with a large selection of coordinating products is available and includes hexagon, herringbone, basketweave mosaics, 12x12, 18x18, 12x24, subway tiles, pencil trims, borders, and more.