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<p>[QUOTE=&quot;John Anthony, post: 2205877, member: 42773&quot;]Horn silver is a type of salt, Silver Chloride (AgCl). It&#039;s an encrustation that can develop on coins when the silver in the coin reacts with hydrogen chloride (HCL) in the ground. Coins with AgCl are typically ground finds, as HCL rarely occurs in the atmosphere. It can occur in phases: a light, non-crystalline phase, and a darker, crystalline phase. It can make a coin look pretty awful, and it&#039;s not not easy to clean, so I recommend avoiding coins that show horn silver. However, to my knowledge, it won&#039;t continue to grow, like BD, unless you expose it directly to HCL.[/QUOTE]</p><p><br /></p>

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