The couple walking their dog in California's Gold Country unearthed a gold coin treasure in 2013. Hidden beneath a tree were cans with 1847–1894 coins. Over $10 million lay in the Saddle Ridge Hoard.
During WWII, the U.S. Mint produced few steel pennies due to copper shortages. However, some copper coins were accidentally made. A Massachusetts child finds a rare 1943 copper penny in his lunch money in 2019. Estimates exceeded $1.7 million.
Goldsmith Ephraim Brasher minted Doubloons in 1787. In 2011, a New York City waste collector found one of these rare coins while cleaning out a deceased relative's home. Nearly $7 million coin auctioned.
The five 1913 Liberty Head nickels are sought by collectors. In 2013, a North Carolina family unearthed a rare nickel in a closet after inheriting their grandfather's coin collection. About $3 million was paid for this coin.
Most 1933 $20 Double Eagle gold coins were burned by the Gold Reserve Act. Some avoided annihilation. One of these coins sold for over $7.5 million in 2002 after a Philadelphia jeweler found it in a safety deposit box.
The British metal detectorist unearthed a 1,000-year-old Viking silver coin and jewelry trove in 2015. Found were 600 coins and other items worth £1 million ($1.3 million).