UMI Stone - Marble, Granite, Porcelain Stone Wholesale Distributor | Florida -Naples, Tampa, Jackson, UMI Stone is an importer, distributor and wholesaler of the finest stone slab materials, including granite, marble, quartzite, precious stone, onyx, travertine, Pompeii Quartz, Infinity Porcelain and Vetrazzo. Servicing Florida with locations in Naples, Tampa, Jacksonville, Boynton Beach, as well as the greater Atlanta, GA region.