Collectible coins, particularly the $2.50 Liberty Gold pieces, are a significant type of numismatic item in American coin history. Minted between 1840 and 1907, these coins feature a design showcasing Lady Liberty on the obverse and an eagle on the reverse. The $2.50 denomination, also known as a quarter eagle, contains 0.12094 ounces of gold and was used primarily as currency during its time. Collectors value these coins for their historical significance, gold content, and artistic design.