Mosaic is the
art of creating images with an assemblage of small pieces of colored
glass, stone, or other materials. It is a technique of
decorative art or
interior decoration. Most mosaics are made of small, flat, roughly
square, pieces of stone or glass of different colors, known as
tesserae; but some, especially floor mosaics, may also be made of small rounded pieces of stone, and called "pebble mosaics".