Rust On A Bronze?

Discussion in 'Ancient Coins' started by Numisnewbiest, Jul 19, 2020.

  1. Numisnewbiest

    Numisnewbiest Well-Known Member

    Am I seeing things, or is this rust on a sestertius? If it is, is it something to be avoided, or is it a simple fix? And since I'm in a questions mood, how does a bronze coin rust?

    rust.png
     
    Numisnewbiest, Jul 19, 2020
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  3. John Conduitt

    John Conduitt Well-Known Member

    Presumably it's a deposit rather than rust
     
    John Conduitt, Jul 19, 2020
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  4. ancient coin hunter

    ancient coin hunter 3rd Century Usurper

    I agree - looks like a crusty deposit.
     
    ancient coin hunter, Jul 19, 2020
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  5. Victor_Clark

    Victor_Clark all my best friends are dead Romans Dealer

    You can get rust on bronze coins as the alloys can contain trace amounts of iron, sometimes enough for the coin to be slightly magnetic. I have a page on the metallurgy of Constantinian bronzes, if anyone is interested.

    http://www.constantinethegreatcoins.com/metallurgy/
     
    Victor_Clark, Jul 19, 2020
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