Microcline is a potassium aluminium silicate from feldspar group. Crystallized sample with mica.

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Photo credit: © José María Barres Manuel / Alamy / Afripics
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Keywords: aluminium, close-, crystals, feldspar, geology, horizontal, mica, microclina, microcline, mineral, mineralogy, muscovita, potassium, sample, silicate, tectosilicate, triclinic