Featured Antique pin. XRF Test confused me Acid sone also.

Discussion in 'Jewelry' started by gauntlettgems, Jun 4, 2025.

  1. gauntlettgems

    gauntlettgems Well-Known Member

    IMG_1928.jpeg IMG_1929.jpeg IMG_1930.jpeg IMG_1931.jpeg
    Hi,
    Can anyone help me with this piece? I did t want to file into it. XRF goes from 15+ kt to almost 19kt on certain spots. The acid sat for 20 minutes plus


    Rolled gold?? Maybe?

    what say ye?
     
    gauntlettgems, Jun 4, 2025
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  2. mirana

    mirana Well-Known Member

    I have a 19th c "doorknocker" style pin that also XRF tested for 15K for the main body and 21K for the three dangling ball accents. I assumed different parts were different karats. Is the test saying different for the main body versus the dangle or applied details?
     
    mirana, Jun 4, 2025
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  3. gauntlettgems

    gauntlettgems Well-Known Member

    Yes. The ball is the over 18k. The upper portion is the 15k plus. It’s also reading non-standard gold karat
     
    gauntlettgems, Jun 4, 2025
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    Marote, kyratango and Any Jewelry like this.
  4. mirana

    mirana Well-Known Member

    Might be a trend then. Using different karats might have made certain pieces stand out when new. I would not think it filled.
     
    mirana, Jun 4, 2025
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  5. gauntlettgems

    gauntlettgems Well-Known Member

    Ty!
     
    gauntlettgems, Jun 4, 2025
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  6. Ratsy Brown

    Ratsy Brown Well-Known Member

    I don’t know the reason why but i have had a few old items that test different on different parts.

    Recently sold a nice cameo mount that was 18ct on the front and surround, but 15ct back panel. It was all one piece so not a possibly marriage of items. I suppose if its unmarked there is less chance of it being a consistent purity?
     
    Ratsy Brown, Jun 4, 2025
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    komokwa and Any Jewelry like this.
  7. gauntlettgems

    gauntlettgems Well-Known Member

    I think that’s a basic thing with older pieces.
     
    gauntlettgems, Jun 5, 2025
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