[Cast Stone Products | American Masonry Supply | Cast Stone Mantels, Cast Stone Columns, Cast Stone Balustrade, Cast Stone Entry Ways, Cast Stone Finials - Cast Stone Products | American Masonry Supply American Masonry Supply, Inc. is an industry leading manufacturer of architectural cast stone products, cast stone mantels, cast stone balustrades, ornamental plaster, glass fiber reinforced concrete, decorative resin and plaster moldings. AMS's architectural cast stone includes products such as cast stone columns, cast stone balustrade, cast stone entry ways, finials, and much more.]