Granite Certified by Dupont Nothing compares to the unique beauty of natural stone. Granite Certified by DuPont is the first and only natural stone strictly selected for quality, according to our strict 5-Point Advantage. Granite Certified by DuPont also comes in a stunning range of colors and patterns. Get the beauty of nature and peace of mind. What makes Granite Certified by DuPont the natural choice for your home? Superior Materials Rigorous quality control standards ensure every surface is produced from the finest stone available. For more information