A greenish clay mineral, a hydrous silicate of potassium, iron, aluminum, or magnesium, (K,Na)(Al,Fe,Mg)2(Al,Si)4O10(OH)2, found in greensand and used as a fertilizer and water softener.
GLAUCONITE
Meaning of GLAUCONITE in English
Environmental engineering English vocabulary. Английский словарь экологического инжиниринга. 2012