bournonite
[bawr-nuh-nahyt, bohr-, boo r-]
- a sulfide of lead, antimony, and copper, PbCuSbS3, occurring in gray to black crystals or granular masses.
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Origin of bournonite
Also called cogwheel ore.
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018