A rare mineral, a hydrated variety of cerite, that contains cerium and other rare earth elements.
From geo- (earth) + cerite (a cerium-bearing mineral named from Ceres, the asteroid). Named to indicate its terrestrial occurrence and relationship to cerite.
Geocerite is so rare that most people interested in minerals will never see a specimen, yet it reveals Earth's hidden chemistry and the diversity of minerals locked in ancient rocks.
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