Mosaic has a long history, starting in Mesopotamia in the 3rd millennium BC. Mosaic is the art of creating images with an assemblage of small pieces of colored glass, stone, or other materials. Blue mosaic tile is a technique of decorative art or interior decoration. Ceramic mosaics are made of small, flat, roughly square, pieces of ceramics of different colors, known as tesserae; but some, especially floor mosaics, may also be made of small rounded, hexagon pieces of ceramics. Nowadays, blue green mosaic tile is well used for kitchen backsplash, bathroom wall, shower wall and floor, countertops.