Do American Silver Eagles Tarnish?

By GovMint :

Despite being of high quality at 99.9% purity, American Silver Eagles are not immune to tarnishing. The slight alloy composition, which is not 100% pure silver, renders them vulnerable to tarnishing over time, primarily upon exposure to air and specific environmental conditions. While pure silver is less prone to tarnishing due to its resistance to oxidation, the slight .01% presence of other metals in Silver Eagles can lead to tarnishing over time. Proper storage and handling practices are recommended to maintain the appearance of silver bullion coins, like Silver Eagles.

Sources Used:

https://coinstar.com/helpcenter/