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Blue powdery color on denarius
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<p>[QUOTE="robinjojo, post: 4466201, member: 110226"]I'm sure the coin does not have bronze disease. </p><p><br /></p><p>It's a nice coin. I would keep an eye on it. The less that is done to it the better.</p><p><br /></p><p>One more possibility is that the blue deposits are just remnants of the original surface of the coin, when it was found. Ancient coins usually are quite encrusted with dirt, clay, oxidized minerals (such as copper), horn silver and other materials that are the result of centuries of deposition. Most coins, especially silver coins are cleaned, as is the case with your coin. So, it is possible that the blue deposits are areas that retain some of the original surface.</p><p><br /></p><p>As I suggested, leave the coin as-is and check it over from time to time to see if there are any changes. With time (several years) the coin will tone to a nice color, as the air reacts with the silver.[/QUOTE]</p><p><br /></p>
[QUOTE="robinjojo, post: 4466201, member: 110226"]I'm sure the coin does not have bronze disease. It's a nice coin. I would keep an eye on it. The less that is done to it the better. One more possibility is that the blue deposits are just remnants of the original surface of the coin, when it was found. Ancient coins usually are quite encrusted with dirt, clay, oxidized minerals (such as copper), horn silver and other materials that are the result of centuries of deposition. Most coins, especially silver coins are cleaned, as is the case with your coin. So, it is possible that the blue deposits are areas that retain some of the original surface. As I suggested, leave the coin as-is and check it over from time to time to see if there are any changes. With time (several years) the coin will tone to a nice color, as the air reacts with the silver.[/QUOTE]
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Blue powdery color on denarius
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