goethite
Noun
Meaning
A hydrous oxide of iron, occurring in prismatic crystals, also massive, with a fibrous, reniform, or stalactitic structure. The color varies from yellowish to blackish brown.
Source: Webster's dictionarySynonyms
gothite
cast iron
amphibole
gibbsite
chalcopyrite
augite
chalybite
lepidomelane
cassiterite
biotite
Ferri
bornite
bentonite
brookite
brucite
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