Image by danzig_hamburg on Pixabay · Pixabay License
hydrous mica
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mineral group of any of the illite group of clay minerals, including illite, bramallite (a sodium illite), and glauconite.
Image by danzig_hamburg on Pixabay · Pixabay License
Also known as hydromica
mineral group of any of the illite group of clay minerals, including illite, bramallite (a sodium illite), and glauconite.