Collectible coins are typically defined by their rarity, historical significance, and demand among numismatists. The United States has produced various collectible coins, including notable issues such as the 1849 Templeton Reid gold coin, which was minted in Georgia during a period of gold rush activity. The G10 designation often refers to a specific grading system for collectible coins, indicating their quality and condition. Coins from this era can be highly sought after by collectors due to their unique stories and the limited number of pieces available.