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<p>[QUOTE="joecoincollect, post: 4400880, member: 71338"]Very impressive coin. What is it? Is it bronze, or billon? Not sure if I could afford it because I heard that obverse ruler is expensive, especially for a decent one like yours. There are different reasons for how a coin looks. Like you mentioned, it's how it was buried, like in a pot or just in dirt, the type of soil or its makeup, and of course what was done with it after discovery. I probably ruined a few cheap bronzes when I started months ago by over-cleaning them. I would say its over cleaning when you not only removed the dirt/mineralization, but also get to light colored metal (e.g., bronze/copper appear pinkish/orange). I keep mineralization unless its mixed with corrosion. For example, I was cleaning a coin recently so I could identify it and read the legend, but the metal is mixed with mineralization and corrosion, but it's altogether soft metal because of corrosion. I'm loathe to keep corrosive conditions like that on an ancient, so I either get rid of the coin cheap or clean it so that only new metal is exposed, then I try to re-tone or just leave as-is and put museum wax on it, and put in an airtight or regular 2x2 holder[/QUOTE]</p><p><br /></p>
[QUOTE="joecoincollect, post: 4400880, member: 71338"]Very impressive coin. What is it? Is it bronze, or billon? Not sure if I could afford it because I heard that obverse ruler is expensive, especially for a decent one like yours. There are different reasons for how a coin looks. Like you mentioned, it's how it was buried, like in a pot or just in dirt, the type of soil or its makeup, and of course what was done with it after discovery. I probably ruined a few cheap bronzes when I started months ago by over-cleaning them. I would say its over cleaning when you not only removed the dirt/mineralization, but also get to light colored metal (e.g., bronze/copper appear pinkish/orange). I keep mineralization unless its mixed with corrosion. For example, I was cleaning a coin recently so I could identify it and read the legend, but the metal is mixed with mineralization and corrosion, but it's altogether soft metal because of corrosion. I'm loathe to keep corrosive conditions like that on an ancient, so I either get rid of the coin cheap or clean it so that only new metal is exposed, then I try to re-tone or just leave as-is and put museum wax on it, and put in an airtight or regular 2x2 holder[/QUOTE]
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