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