• Most cleaners sold by department stores and jewelers contain chemicals such as ammonias, acids, and alcohol. These chemicals can be VERY harmful to semi-precious stones and costume jewelry and can accelerate the discoloration and tarnishing of precious metals.• Sparkle Bright Products doesn't use any harsh chemicals, is non-corrosive, and eco-conscious; yet strong enough to clean the toughest dirt and grime from every jewelry piece a person owns.