The Sacagawea Dollar is a golden-colored dollar coin that was first issued by the United States Mint in 2000. It features an image of Sacagawea, a Shoshone woman who assisted the Lewis and Clark expedition, on the obverse side. The reverse side depicts a soaring eagle, representing freedom. The 2011 version of the Sacagawea Dollar is part of a series that aimed to honor Native American contributions to U.S. history. These coins are primarily made of manganese-brass and have a specific collectible interest among numismatists for their historical significance and unique design.