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1861 IHC Pattern Judd 274
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<p>[QUOTE="calcol, post: 8406775, member: 77639"]Yes, NGC or PCGS will do an elemental analysis ... but it will cost a fair bit. Call them. My experience with PCGS is that they send coins out to a private lab for elemental analysis. The lab uses scanning electron microscopy. It's still based on an analysis of emitted x-rays, but instead of a high energy x-rays displacing orbital electrons (the case for handheld x-ray fluorescence analyzers), it uses high energy electrons. The advantage is that multiple spots on a coin's side can be analyzed.</p><p><br /></p><p>Some coin dealers have a handheld analyzer. If you can get one to do an analysis and the alloy turns out to be bronze, there's little sense in going further.</p><p><br /></p><p>Before springing for elemental analysis by a TPG, send the coin for grading. You don't want to pay extra for analyzing a fake. If the grading company agrees with your Judd number (and they might), there's probably not much value in elemental analysis unless you're really curious.</p><p><br /></p><p>Cal[/QUOTE]</p><p><br /></p>
[QUOTE="calcol, post: 8406775, member: 77639"]Yes, NGC or PCGS will do an elemental analysis ... but it will cost a fair bit. Call them. My experience with PCGS is that they send coins out to a private lab for elemental analysis. The lab uses scanning electron microscopy. It's still based on an analysis of emitted x-rays, but instead of a high energy x-rays displacing orbital electrons (the case for handheld x-ray fluorescence analyzers), it uses high energy electrons. The advantage is that multiple spots on a coin's side can be analyzed. Some coin dealers have a handheld analyzer. If you can get one to do an analysis and the alloy turns out to be bronze, there's little sense in going further. Before springing for elemental analysis by a TPG, send the coin for grading. You don't want to pay extra for analyzing a fake. If the grading company agrees with your Judd number (and they might), there's probably not much value in elemental analysis unless you're really curious. Cal[/QUOTE]
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