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jmj3esqjmj3esq Posts: 5,421 ✭
in U.S. Coin Forum
How do gold coins tone? I thought it never tarnished? There still are a few out there that do. Please explain.

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    TomBTomB Posts: 20,730 ✭✭✭✭✭
    US gold coinage made for circulation is 90% gold and alloyed primarily with various amounts of copper and silver. The copper and silver still tone.
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    AUandAGAUandAG Posts: 24,537 ✭✭✭✭✭


    << <i>US gold coinage made for circulation is 90% gold and alloyed primarily with various amounts of copper and silver. The copper and silver still tone. >>



    +1
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    jmj3esqjmj3esq Posts: 5,421 ✭
    How can you explain how pure fine gold Eagles tone? No alloy there.
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    habaracahabaraca Posts: 1,964 ✭✭✭✭✭
    Pollution sticking to dirty coin
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    crypto79crypto79 Posts: 8,623 ✭


    << <i>How can you explain how pure fine gold Eagles tone? No alloy there. >>



    AGE are 22k = .916 fine with the rest copper
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    MsMorrisineMsMorrisine Posts: 32,203 ✭✭✭✭✭
    US Gold Eagles are 22k not 24k


    but even some .9999 US Mint gold has colored up - surface contamination or 0.0001 alloy toning is suspected.

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    CaptHenwayCaptHenway Posts: 31,550 ✭✭✭✭✭


    << <i>How can you explain how pure fine gold Eagles tone? No alloy there. >>



    The American Eagle gold coins are only 22 karat.
    Numismatist. 50 year member ANA. Winner of four ANA Heath Literary Awards; three Wayte and Olga Raymond Literary Awards; Numismatist of the Year Award 2009, and Lifetime Achievement Award 2020. Winner numerous NLG Literary Awards.
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    PerryHallPerryHall Posts: 45,422 ✭✭✭✭✭


    << <i>

    << <i>How can you explain how pure fine gold Eagles tone? No alloy there. >>



    The American Eagle gold coins are only 22 karat. >>



    He may have been thinking of the Buffalos which are pure gold.

    Worry is the interest you pay on a debt you may not owe.

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    TwoSides2aCoinTwoSides2aCoin Posts: 43,842 ✭✭✭✭✭
    Time and other elements, like copper and the environment causes toning on gold coins. Something has to change or it wouldn't.
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    guitarwesguitarwes Posts: 9,240 ✭✭✭


    << <i>

    << <i>

    << <i>How can you explain how pure fine gold Eagles tone? No alloy there. >>



    The American Eagle gold coins are only 22 karat. >>



    He may have been thinking of the Buffalos which are pure gold. >>



    In that case it may be some contaminates on the surface.
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    ambro51ambro51 Posts: 13,604 ✭✭✭✭✭
    Simple. Our Love Affair with toning, wishful thinking and increased value.
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    rickoricko Posts: 98,724 ✭✭✭✭✭
    As stated above, AGE's have silver and copper....= tarnish..... pure gold will only discolor due to surface contaminants. Cheers, RickO
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    lostincoinslostincoins Posts: 4,278 ✭
    think about gold rings and how they change color untill cleaned it is a reaction with what could be considered the impurities in the gold that are actually oxidizing and thusly causing the so called toning.
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    PerryHallPerryHall Posts: 45,422 ✭✭✭✭✭


    << <i>think about gold rings and how they change color untill cleaned it is a reaction with what could be considered the impurities in the gold that are actually oxidizing and thusly causing the so called toning. >>



    Not really relevant. Jewelry has a much higher alloy content compared to gold coins so you would expect it to tone especially when it's in contact with your body.

    Worry is the interest you pay on a debt you may not owe.

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