Shelter Art & Collectibles March 29, 2021 This $5 Gold Coin From 1822 Just Sold for $8.4 Million, Shattering Auction Records It's now the most valuable coin the United States has ever minted.

If your gold bar or coins don't have a hallmark, it's likely they're fake. In the U.S., the most common hallmark for gold is "Au," which stands for Aurum, the Latin word for gold.