A mineral consisting of manganese oxyhydroxide, typically occurring as steel-gray or black prisms.
- Museum-quality specimens of manganite have been collected from the Taylor mine for many years and can be seen in collections around the world.
- There are exceptions, such as German manganite.
- It never occurs as a free element, but only in ores such as pyrolusite, manganite, psilomelane, and rhodochrosite.
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