Ultra Soft Jewelry Polishing Cloth for Silver, Gold, Platinum, Brass, & Most Metals, 12"x15" Largest Size Ultra Soft Jewelry Polishing Cloth For Sterling Silver, Some Gold, and Platinum 12" x 15" Seamed and Folded Down the Middle Inner Cloth for Polishing and outer cloth for buffing Should not be used on coral, ivory, amber, malachite, pearls, opals, jade or turquoise