Coinguide.comAnswer
Apr 01, 2026 - 11:00 AM
Yes, silver naturally oxidizes over time, turning dark or "rainbow" toned. This is normal for 90% silver and does not affect the value of the silver inside.
Can 90% silver coins tarnish? 90% Silver Coins - Mixed Halves - $100 Face Value 90% Silver Coins
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Open Apr 01, 2026 - 09:00 AM
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90% Silver Coins - Mixed Halves - $100 Face Value
These bags of 90% Silver Coins are dated 1964 or earlier and all coins will ship in a canvas bag. Beginning in 1965, the U.S. Mint began to subtract pure silver from the minting process reducing the 90% silver purity to 40%. Now, the mint has completely removed pure silver from the mix. Today, those...
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