Sterling silver, composed of 92.5% silver and 7.5% other metals (typically copper), is susceptible to a chemical reaction known as tarnishing. This surface discoloration presents as a darkening or dulling of the metal’s inherent shine. While elemental silver itself is relatively inert, the added metals within the alloy react with elements in the environment, primarily sulfur compounds.
The phenomenon of darkening holds significant implications for the longevity and aesthetic appeal of sterling silver items. Maintaining its brilliance is important for preserving the value of jewelry, silverware, and other decorative objects. Historically, techniques have been developed and refined to prevent or reverse this surface reaction, reflecting the enduring desire to maintain the luster of this valuable metal.