Ramsdellite

Ramsdellite natural mineral from Mistake mine Sam Powell peak box canyon district Arizona USA Size - 2.9cm x 2.6cm x 1.5cm Weight- 15g You will receive the item in the photo 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