cogwheel-ore

cogwheel ore

noun Mineralogy.
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bournonite

[bawr-nuh-nahyt, bohr-, boor-]
noun Mineralogy.
a sulfide of lead, antimony, and copper, PbCuSbS 3 , occurring in gray to black crystals or granular masses.
Also called cogwheel ore.


Origin:
1795–1805; named after Count J. L. de Bournon (died 1825), French mineralogist; see -ite1

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