Black sands are sandy deposits that contain a high percentage of heavy metals of economic importance because they enter into important strategic industries, and they are named so because they contain a high percentage of dark-black minerals (iron minerals) such as ilmenite and magnetite. Black sand contains a percentage of economic minerals (ilmenite - zircon - magnetite - rutile - agate) and monazite, which contains radioactive minerals. Many countries extract heavy minerals from the black sands they host due to their economic importance. Also, the beaches are cleared of environmentally harmful radioactive substances