Definition of sericite in English:


Syllabification: ser·i·cite
Pronunciation: /ˈserəˌsīt


  • A fine-grained fibrous variety of muscovite formed by the alteration of feldspar, found chiefly in schist and in hydrothermally altered rock.
    More example sentences
    • The samples from the andesitic units, occurring as tectonic lenses in the greywacke sequence, exhibit plagioclase phenocrysts altered to sericite, calcite and epidote, set in a matrix of chloritized pyroxene and amphibole.
    • The nearby K - 2 deposit is very similar to the Kettle and contains, besides quartz, veins with calcite, ferroan dolomite, and minor chlorite, potassium feldspar, adularia, sericite, pyrite, and barite.
    • Many of the grains are partially to entirely replaced by fine-grained sericite and quartz.


mid 19th century: from Latin sericum 'silk' + -ite1.

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