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boulangerite

[boo-lan-juh-rahyt]
noun
  1. a bluish lead-gray mineral, lead antimony sulfide, Pb5Sb4S11, a minor ore of lead.
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Origin of boulangerite

named after C. L. Boulanger (1810–49), French mining engineer; see -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018