Orthoclase

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https://term.museum-digital.de/md-de/tag/36367

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"Orthoclase, or orthoclase feldspar (endmember formula KAlSi3O8), is an important tectosilicate mineral which forms igneous rock. The name is from the Ancient Greek for "straight fracture," because its two cleavage planes are at right angles to each other. It is a type of potassium feldspar, also known as K-feldspar. The gem known as moonstone (see below) is largely composed of orthoclase." - (en.wikipedia.org 07.01.2022)
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  • Mineralparagenese im Königshainer Monzogranit

    Mineralparagenese im Königshainer Monzogranit

    Das strohgelbe bis rostbraune...

    Object information
    Image: Museum der Westlausitz Kamenz - CC BY-NC-SA

  • Ortoklász

    Ortoklász

    Max. 1,5 cm, vajsárga, zömök,...

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

  • Ortoklász

    Ortoklász

    Max. 1 cm-es,...

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

  • Kvarc, ortoklász

    Kvarc, ortoklász

    Prizmás kvarckristályok...

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

  • Albit, ortoklász

    Albit, ortoklász

    Albit: krémszínű, jól hasadó...

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

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