The basalt dunes are believed to contain the minerals chromite, magnetite, and ilmenite. Layered intrusions with cumulate peridotite are typically associated with sulfide or chromite ores. Mineral resources include nickel, copper, manganese, and chromite. Chromium is mined as chromite (FeCrO) ore. Ore deposits of chromite form as early magmatic differentiates. Major minerals found here include coal, iron ore, asbestos, chromite, mica, and kyanite. The troilite nodules contain inclusions of chromite, sulfides, phosphates, silica and copper. Ferrochrome is produced by electric arc carbothermic reduction of chromite. In these applications, the refractory materials are made from mixtures of chromite and magnesite. Examples of species include spinel (MgAlO), chromite (FeCrO), and magnetite (FeO). India ranks second amongst the world's largest producers of barite and chromite. Minerals such as cinnabar, chromite, and silver were also mined. The country has reserves of metallurgical-grade chromite. Copper chromite is a useful hydrogenation catalyst. In 1943 all of the chromite ore Germany imported for its weaponry came from Turkey.