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chamosite

American  
[sham-uh-zahyt] / ˈʃæm əˌzaɪt /

noun

  1. a mineral of the chlorite group, hydrous aluminum silicate of iron, occurring in gray or black crystals in oolitic iron ore.


Etymology

Origin of chamosite

1825–35; variant of camoisite, named after Chamoison in the Valais, Switzerland, where found; -ite 1