bournonite
noun
bour·non·ite
ˈbōrnəˌnīt,
ˈbȯr-,
ˈbu̇r-
plural -s
: a mineral PbCuSbS3 consisting of a steel-gray or black metallic-looking sulfide of antimony, lead, and copper occurring in orthorhombic crystals, and also massive see wheel ore
Word History
Etymology
Count J. L. de Bournon †1825 French mineralogist + English -ite