pyrolusite

• Mineral compuesto principalmente de dióxido de manganeso, que constituye una importante mena para la extracción de manganeso.

A mineral composed primarily of manganese dioxide, which serves as a significant ore for the extraction of manganese.

1. Manganese dioxide mineralC2formalscientific

   A black or dark gray mineral composed of manganese dioxide, commonly found in sedimentary deposits and used as an important ore of manganese.

   pirolusita

   • Pyrolusite is often found in association with other manganese minerals.
   • The black powder in some dry cell batteries is derived from pyrolusite.
   • Geologists identified the deposit as rich in pyrolusite.