Collectible coins, such as the United States Gold Eagle, are minted primarily for both investment and numismatic purposes. The 2005 Gold Eagle, specifically the 10 Ten Dollar denomination, contains a quarter ounce of gold and features iconic designs like the Lady Liberty on the obverse and a family of eagles on the reverse. These coins are made from a gold alloy and are highly sought after by collectors and investors alike due to their intrinsic gold content and historical significance. The "N A" designation typically refers to a specific grading or numerical classification that indicates the coin's condition or authenticity within the marketplace.