Gold dollars are collectible coins minted in the United States, with the 1855 Charlotte Mint being a notable example. These coins typically contain 90% gold and were produced during a time when gold rushes significantly impacted the economy. The Charlotte Mint, located in North Carolina, specialized in striking gold coins due to the nearby gold discoveries, making coins like the 1 One Dollar significant for collectors and historians. The 1855 issuance is particularly sought after due to its limited mintage and historical context.