Description
Manganite forms short to long columnar, longitudinally grooved crystals. It is formed at low temperatures in an oxygen-poor environment (manganese concretions in the depths of the Pacific, Atlantic and Indian Oceans).
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Manganite
/ $938
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High quality and rich druse of large lustrous black manganite crystals from a type locality! Ideal specimen format. Historical specimen from the collection of J. H. Bernard
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