RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA / SCIENCE PHOTO LIBRARY RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA / SCIENCE PHOTO LIBRARY
Manganite crystals. This mineral consists of manganese oxide-hydroxide, MnO(OH), characterised by short, lustrous, prismatic crystals which are often grey, reddish brown, or black.
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