Thought it was dirt or even rainbow but it's blue why

Discussion in 'Coin Chat' started by Italy8686, Apr 21, 2021.

  1. Italy8686

    Italy8686 Italy8686

    82 d lg date 20210421_094038.jpg 20210421_094100.jpg why blue
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  3. William F

    William F Well-Known Member

    Looks like something (not sure what) was spilled on it at some point and everything below the high wear spots just retained that color, I don't think that blueish tint is ever going to come out of the low spots.
    BTW, your pictures seem to be a little clearer through the loupe so keep using that ;)
  4. Italy8686

    Italy8686 Italy8686

    That sucks but looks cool
  5. Collecting Nut

    Collecting Nut Borderline Hoarder

    Just toning due to whatever came in contact with the copper. Copper is a metal that tones many colors. It all depends on what it came in contact with.

    I collect rocks and I have several pieces of raw copper. Along with the so called, copper color, I have samples of blue, orange, yellow and red copper to mention a few. Very interesting metal.
    Matthew Kruse and Copper lover like this.
  6. lordmarcovan

    lordmarcovan Eclectic & avid numismatist Moderator

    There could be some residue of something on there, but that just looks like toning to me. I don't find it all that bad looking.
  7. SensibleSal66

    SensibleSal66 Casual Collector / error expert "in Training "

    Just my opinion , Crop Pics. Use a Program called LunaPic . It's free and no Download necessary . ;)
  8. medoraman

    medoraman Supporter! Supporter

    I agree its just blue. Copper rarely can tone blue, I have seen coins coming from metal detecting come out of the ground pure blue. Blue is actually a very rare and desired color on ancient coins. I love finding one, but lots of competition and high prices.
  9. BJBII

    BJBII Metrologist, CSSBB

    I think that copper sulfate is blueish green, which could be the result of a somewhat diluted acid. It may have been the result of being buried in some slightly acidic soil, or someone tried to clean it with lemon juice, or a hundred other things found around the house.
    Just my opinion . . .
    Italy8686 likes this.
  10. Insider

    Insider Talent on loan from...

    Err, perhaps naturally. ;)
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  11. Italy8686

    Italy8686 Italy8686

    I was thinking that to
  12. medoraman

    medoraman Supporter! Supporter

    Of course sir. Copper is easy to become blue under heat. I bring up ancient coins since there is documentation of them being recovered blue, and its a deep, saturated blue to the core which could not easily be faked, so therefore proves it CAN happen naturally over time. Given this is so new, it would not be a deep color, just surface toning.
  13. Insider

    Insider Talent on loan from...

    I am in complete agreement with your statement. Copper rarely can tone blue in nature. ;)
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