Dallas Countertops - ALLIED STONE is one of the largest full-service Fabricator and Installer of Natural Stone products in Texas & Oklahoma, specializing in residential countertops. ALLIED STONE is also one of the largest regional direct importers of Natural Stone. We import and stock an unparalleled selection of more than 500 colors and in excess of 15,000 granite, marble, travertine, limestone, quartzite, and onyx slabs.