Minsur S.A. operates as a mining company. The company explores for tin, gold, ferroalloys, copper, niobium, and tantalum properties. Its projects include San Rafael, a tin mining unit located in the Puno region, Peru; Pucamarca, a gold mining unit located in the Tacna region, Peru; and Pitinga, a tin, niobium, and tantalum mining unit located in the northeastern region of the state of Amazonas, Brazil. The company was incorporated in 1977 and is based in Lima, Peru. Minsur S.A. is a subsidiary of Inversiones Breca S.A.