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Cleaned .... and destroyed an Antoninianus
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<p>[QUOTE="gsimonel, post: 7622233, member: 82549"]The black something was the silvering. Your misfortune is due to the rapid debasement of Roman coinage doing the twenty year period between the reigns of Philip I and Claudius II. The Philip coin, although heavily debased with copper, had a similar metal content throughout. The Claudius II had a more or less billon/bronze core with a thick silver wash. The silver wash oxidized, combined with other chemicals in its local environment, and formed that thick black crud. When you removed that, you exposed the billon core.</p><p><br /></p><p>So if, like me, you prefer to blame others for your own self-inflicted misfortunes, then you should probably blame Claudius Gothicus for screwing up the currency. It's not your fault. If Claudius II had just left the currency alone, your coin would have turned out just fine.[/QUOTE]</p><p><br /></p>
[QUOTE="gsimonel, post: 7622233, member: 82549"]The black something was the silvering. Your misfortune is due to the rapid debasement of Roman coinage doing the twenty year period between the reigns of Philip I and Claudius II. The Philip coin, although heavily debased with copper, had a similar metal content throughout. The Claudius II had a more or less billon/bronze core with a thick silver wash. The silver wash oxidized, combined with other chemicals in its local environment, and formed that thick black crud. When you removed that, you exposed the billon core. So if, like me, you prefer to blame others for your own self-inflicted misfortunes, then you should probably blame Claudius Gothicus for screwing up the currency. It's not your fault. If Claudius II had just left the currency alone, your coin would have turned out just fine.[/QUOTE]
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Cleaned .... and destroyed an Antoninianus
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