Premium Grade White Thassos Marble Round Mosaic Tiles w/ Azul Macaubas Blue Square Dots. Greek Thassos White Pure White Crystal Marble Polished 2 inch Round Mosaic Wall & Floor Tiles are perfect for any interior projects. The 2 inch Thassos White Marble Round Mosaic tiles can be used for a kitchen backsplash, bathroom flooring, shower surround, dining room, entryway, spa. Our timeless Glossy White Thassos Marble Round Mosaic tiles with a large selection of coordinating products is available and include arabesque, fish scale, penny round, herringbone, basketweave mosaics, 12x12, 18x18, 12x24, subway tiles, moldings, borders, and more.