Why Silver Coins Tarnish: Causes & Prevention
Silver coins tarnish because silver reacts chemically with hydrogen sulfide (H2S) and other sulfur compounds in the air, forming a dark layer of silver sulfide (Ag2S) on the surface. This reaction is accelerated by moisture, oxygen, skin oils, and environmental pollutants. 1. What Is Silver Coin Tarnish? If you have ever pulled a silver coin…