The Intercept Anti-Abrasive Micro Fiber polishing cloth will not scratch your valuable jewelry pieces and is safe for all metals and gemstones. This polishing cloth is chemical free, non-toxic and will remove surface layer tarnish before it infuses in you metal-based jewelry to give a brilliant shine. This special non-treated microfiber cloth is safe for use on all precious and semi-precious stones. It will remove fingerprints, grease and smears without abrasion, damage, lint or dust residue. The Microfiber polishing cloth is made for repeated use and can be hand or machine washed separately with a mild detergent (no bleach or fabric softener). It should never be washed with cotton towels or fabrics that may leave lint. Each package contains one 12"x12" polishing cloth.