Bixbyite is a rare mineral that was first discovered in 1905. It is a dark reddish-black mineral that is usually found in small amounts in some igneous rocks. While it is a unique mineral, there are a few synonyms that can be used to describe it, including manganese iron oxide, manganoan iron oxide, and bixbite. These variations are derived from the chemical composition of the mineral, which contains both manganese and iron. Despite being a rare mineral, bixbyite has been found in a number of locations worldwide, including the United States, Mexico, Brazil, and Namibia, among others.