About Building Ornaments, Masonry : Natural stone masonry is a type of building masonry construction that uses natural stones, boulders and mortar. This construction technique is used for building foundations, retaining walls, building stones, stone bricks, fa?ade, exterior cornice, stone brackets, stone corbels, stone arches, stone vault, stone murs, stone sign, ashlar stone, keystones. The granite, basalt, marble, and tuff stones used for masonry construction are natural rocks.