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tenorite

tenorite Min.
  (ˈtɛnəraɪt)
  [Named, 1841, after Prof. G. Tenore, President of Naples Academy: see -ite1.]
  Black oxide of copper, found in thin iron-black scales on lava at Vesuvius: see quot.

1865 Maskelyne in Athenæum No. 1980. 472/3 Crystallised Melaconite and Tenorite. 1868 Dana Min. 804 As the names tenorite and melaconite were given the same year, and tenorite was made non-isometric (hexagonal) by its describer, it appears to be right that tenorite should be sustained for the above mineral, and melaconite be left for the isometric kind, if any such proves to be a native species.

Oxford English Dictionary

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