The Ako Grigio 4x9 Rectangle Marble Micro Mosaic has a sophisticated, retro vibe. The polished gray and white tile is composed of multiple marbles, including Nero Marquina, dark and light Bardiglio, and Alaska White. Every stone is carefully selected for color and quality, and artfully arranged into versatile, 4-by-9-inch rectangles Ako makes a great accent tile, especially in smaller spaces.