The coin in question is a Sacagawea Dollar, minted in Philadelphia in the year 2000. This particular coin is notable for its striking design by Glenna Goodacre and Thomas D. Rogers Sr., featuring the image of Sacagawea, a renowned Shoshone woman who played a critical role in the Lewis and Clark Expedition. With a diameter of 26.5 millimeters and a weight of 8.1 grams, the coin is composed of a blend of materials, including 88.5% copper, 6% zinc, 3.5% manganese, and 2% nickel, giving it a distinctive appearance and feel. The edge of the coin is plain, which is characteristic of this series. The mintage for this particular issue is significant, with a total of 767,140,000 coins produced, contributing to its widespread circulation and availability. As a modern coin in the United States' currency collection, it reflects an important part of American heritage and history. Overall, the 2000 Sacagawea Dollar is a fascinating piece of numismatic history, representing not only the art of coin design but also a tribute to an important figure in American exploration.