chamosite


chamosite
noun
a greenish grey or black silicate of iron and aluminum
Hypernyms: ↑iron ore

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/sham"euh zuyt'/, n.
a mineral of the chlorite group, hydrous aluminum silicate of iron, occurring in gray or black crystals in oolitic iron ore.
[1825-35; var. of camoisite, named after Chamoison in the Valais, Switzerland, where found; see -ITE1]

Useful english dictionary. 2012.