Willemite

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https://term.museum-digital.de/md-de/tag/55260
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Willemite is a zinc silicate mineral (Zn2SiO4) and a minor ore of zinc. It is highly fluorescent (green) under shortwave ultraviolet light. It occurs in a variety of colors in daylight, in fibrous masses and apple-green gemmy masses. Troostite is a variant in which part of the zinc is partly replaced by manganese, it occurs in solid brown masses.

It was discovered in 1829 in the Belgian Vieille-Montagne mine. Armand Lévy was shown samples by a student at the university where he was teaching. Lévy named it after William I of the Netherlands(it is occasionally spelled villemite).The troostite variety is named after Dutch-American mineralogist Gerard Troost.
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  • Willemit

    Willemit

    Tömött foltok franklinittel

    Object information
    Image: Herman Ottó Múzeum - CC BY-NC-SA

  • Willemit

    Willemit

    Mai neve: willemit, Lelőhely:...

    Object information
    Image: Viski Károly Múzeum Kalocsa - RR-F

  • Willemit mit Franklinit und Calcit

    Willemit mit Franklinit und Calcit

    Willemit mit Franklinit und...

    Object information
    Image: Saxonia-Freiberg-Stiftung - CC BY-NC-SA

  • Willemit

    Willemit

    Weißradialstrahliger Willemit...

    Object information
    Image: Saxonia-Freiberg-Stiftung - CC BY-NC-SA

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