This coin is a 2005 Sacagawea Dollar, minted in Denver (indicated by the 'D' mint mark). As part of the United States coinage, it features a unique design that celebrates Sacagawea, a figure known for her role in the Lewis and Clark Expedition. The composition of the coin is Manganese-Brass, giving it a distinctive golden color. Measuring 26.5 mm in diameter and weighing 8.07 grams, this dollar coin was produced through a mint strike process, ensuring a high-quality finish. The total mintage for this specific coin stands at 2,520,000, which may influence its market value depending on its condition. Though it has the nominal value of $1, like all coins, its collector value may vary based on factors such as rarity, demand, and the coin's condition. As a modern coin issued by the United States Mint, the 2005 Sacagawea Dollar represents both historical significance and potential interest for numismatists.