The coin in question is a Sacagawea Dollar minted in the year 2000, representing the United States of America. This particular dollar coin features the iconic image of Sacagawea, a Native American woman who played a crucial role in the Lewis and Clark Expedition, symbolizing unity and strength. This specific piece is notable for its special production type and a mint mark of "None," indicating it was produced without any minting facility designation. The coin has a diameter of 26.5 mm and is composed of a unique alloy made up of 88.5% Copper, 6% Zinc, 3.5% Manganese, and 2% Nickel, which together create a distinctive golden hue. The mintage for this coin was an impressive 767,140,000, making it widely circulated, yet still an important collectible due to its historical significance. Although the weight and specific dimensions other than diameter aren’t listed, the Sacagawea Dollar is known for its light weight, designed to encourage use in commerce. Overall, the 2000 Sacagawea Dollar is part of a series that honors an important figure in American history and remains a symbol of progress and inclusion. Collectors often seek it for its design and historical meaning, as well as for its role in the evolving landscape of American currency.