Manganite
Fun Fact: Manganite is distinguishable by its jet black colour and sheen.
Introduction: Manganite can be confused with magnetite, but is distinguishable by its jet black colour and lustrous sheen. It is one of the main ore minerals of manganese, occurring in low temperature veins and in manganese deposits.
Distribution: Found in large amounts at the Otjosondu manganese fields. Also at Kombat Mine.
Composition: Hydroxide
Crystal system: Monoclinic
Lustre: Sub-metallic, metallic
Streak: Red-brown to black
Hardness: 4
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