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bournonite

[bawr-nuh-nahyt, bohr-, boo r-]

noun Mineralogy.

a sulfide of lead, antimony, and copper, PbCuSbS3, occurring in gray to black crystals or granular masses.

Origin of bournonite

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

Also called cogwheel ore.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019