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2016 SLQ 24k gold commem red spot mystery
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<p>[QUOTE="physics-fan3.14, post: 3238653, member: 19165"]This coin is 0.9999 pure gold. What that means is 0.0001 is other stuff (silver and copper, mostly). The copper will sometimes tone. You see this far more often on older coins where they were 0.9000 fine gold, so there was a lot higher concentration of alloys. </p><p><br /></p><p>This is called a "copper spot" and is perfectly original and natural - although it is considered a blemish on modern coinage. Nothing you can do about it, really. Once it appears, you can treat it and temporarily remove it, but it will return.[/QUOTE]</p><p><br /></p>
[QUOTE="physics-fan3.14, post: 3238653, member: 19165"]This coin is 0.9999 pure gold. What that means is 0.0001 is other stuff (silver and copper, mostly). The copper will sometimes tone. You see this far more often on older coins where they were 0.9000 fine gold, so there was a lot higher concentration of alloys. This is called a "copper spot" and is perfectly original and natural - although it is considered a blemish on modern coinage. Nothing you can do about it, really. Once it appears, you can treat it and temporarily remove it, but it will return.[/QUOTE]
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2016 SLQ 24k gold commem red spot mystery
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