Collection: Ramsdellite

Ramsdellite is a relatively uncommon manganese dioxide mineral.
Crystal system- Orthorhombic
Mineral class- Oxide
Hardness- Approximately 3 on the MOHs scale.
Rock formation- It typically forms as a secondary mineral in hydrothermal or sedimentary manganese ore deposits. It is created through the alteration or transformation of precursor manganese bearing minerals like pyrolusite ,groutite or other iron and manganese assemblages,often appearing in crusts, fibrous/lamellar masses or as pseudo morphs after geoutite