by Coins from US Mints | Jan 28, 2026 | Tips & Tricks
When NOT to Clean Coins Numismatic or Rare Coins: Never clean coins with collector value; cleaning reduces their value by removing the original surface patina. Ancient Coins: Removing patina can destroy their history and accelerate “bronze disease”....
by Coins from US Mints | Jan 20, 2026 | Tips & Tricks
Understanding U.S. Mint Marks and Why They Matter If you’re new to collecting U.S. coins, one of the first details you’ll notice is the small letter stamped near the date. That letter is the mint mark, and it tells you where the coin was made. While it might seem...
