Mosaic material is a type of decorative art that uses small pieces of colored glass, stone, or other materials to create a pattern or image. NACRE (5 letters) and TILES (5 letters) are two of the most common materials used in mosaic art. NACRE is a type of iridescent material made from the shells of mollusks, while TILES are thin, flat pieces of ceramic or stone. Both materials can be cut into small pieces and arranged in a variety of patterns to create beautiful works of art.