fibrous jamesonite

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Jamesonite — is a sulfosalt mineral, a lead, iron, antimony sulfide with formula Pb4FeSb6S14. With the addition of manganese it forms a series with benavidesite. It is a dark grey metallic mineral which forms acicular prismatic monoclinic crystals. It is soft … Wikipedia
Jamesonite — Ja me*son*ite, n. [From Prof. Jameson, of Edinburgh.] (Min.) A steel gray mineral, of metallic luster, commonly fibrous massive. It is a sulphide of antimony and lead, with a little iron. [1913 Webster] … The Collaborative International Dictionary of English
jamesonite — ˈjām(p)səˌnīt, məs noun ( s) Etymology: Robert Jameson died 1854 Scottish mineralogist + English ite : a gray orthorhombic mineral Pb4FeSb6S14 consisting of a lead antimony iron sulfide, having a metallic luster, and occurring in fibrous masses … Useful english dictionary
List of minerals — This is a List of minerals for which there are Wikipedia articles. Mineral variety names and mineraloids are to be listed after the valid minerals for each letter.For a complete listing (about 4,000) of all mineral names: List of minerals… … Wikipedia
feather ore — noun : a capillary or fibrous form of jamesonite … Useful english dictionary

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