What is kaolin in geology ?

Kaolin : definition

Kaolin is a white, crumbly clayey rock formed primarily, and sometimes entirely, of a clay mineral : kaolinite.

Kaolin is a rock intensely exploited for its multiple uses in earthenware (manufacture of porcelain), stationery (loading and coating of paper), ceramics, etc...

France produces around 350,000 tonnes of kaolin annually, extracted from muscovite granites from the Armorican Massif (Ploëmeur, Berrien) and northern Massif Central (Echassières).

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