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    Where does clay come from?
    Clay is a soft, loose, earthy material containing particles with a grain size of less than 4 micrometres (μm). It forms as a result of the weathering and erosion of rocks containing the mineral group feldspar (known as the ‘mother of clay’) over vast spans of time.

    What is clay? - Science Learning Hub

    sciencelearn.org.nz
    What type of soil is clay?
    Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolinite, Al 2 Si 2 O 5 (OH) 4). Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impurities, such as a reddish or brownish colour from small amounts of iron oxide.

    Clay - Wikipedia

    en.wikipedia.org
    What is the most important clay?
    Commercially, the most important clays are known as kaolin and bentonite Where does clay come from? Clay is a soft, loose, earthy material containing particles with a grain size of less than 4 micrometres (μm).

    What is clay? - Science Learning Hub

    sciencelearn.org.nz
    What does clay mean?
    The meaning of CLAY is an earthy material that is plastic when moist but hard when fired, that is composed mainly of fine particles of hydrous aluminum silicates and other minerals, and that is used for brick, tile, and pottery; specifically : soil composed chiefly of this material having particles less than a specified size.

    CLAY Definition & Meaning - Merriam-Webster

    merriam-webster.com
    Is clay a mineral?
    Clay is an abundant, naturally occurring, fine-grained material composed predominantly of hydrous aluminum silicates. Clay is not a single mineral, but a number of minerals. Clays fall into six general categories: kaolin, ball clays, fire clays, bentonite, common clays and Fuller’s earth. Clays are common all over the world.

    Clays - Minerals Education Coalition

    mineralseducationcoalition.org
    Why is clay important?
    They are important constituents of soils, and have been useful to humans since ancient times in agriculture and manufacturing. Clay is a very fine-grained geologic material that develops plasticity when wet, but becomes hard, brittle and non–plastic upon drying or firing. It is a very common material, and is the oldest known ceramic.

    Clay mineral - Wikipedia

    en.wikipedia.org
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