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Manganite

Manganite is a mineral that’s composition is manganese oxide-hydroxide, MnO(OH), Crystals of manganite are prismatic and deeply striated parallel to their length; they are often grouped together in bundles. The color is dark steel-grey to iron-black, and the luster brilliant and sub-metallic. The streak is dark reddish-brown.

CharacteristicsEdit

The hardness is 4, and the specific gravity is 4.3. There is a perfect cleavage parallel to the brachypinacoid, and less-perfect cleavage parallel to the prism faces. Twinned crystals are not infrequent.

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