Clay

Clay is a general term including many combinations of one or more clay minerals with traces of metal oxides and organic matter. Geologic clay deposits are mostly composed of phyllosilicate minerals containing variable amounts of water trapped in the mineral structure.

Read more about Clay:  Formation, Definition, Grouping, Historical and Modern Uses

Famous quotes containing the word clay:

    With earth’s first clay they did the last man knead,
    There of the last harvest sowed the seed,
    And what the first morning of creation wrote,
    The last dawn of reckoning shall read.
    Edward Fitzgerald (1809–1883)

    You may melt your metals and cast them into the most beautiful moulds you can; they will never excite me like the forms which this molten earth flows out into. And not only it, but the institutions upon it are plastic like clay in the hands of the potter.
    Henry David Thoreau (1817–1862)