Jamesonite n. : A steel-gray mineral, of metallic luster, commonly fibrous massive. It is a sulphide of antimony and lead, with a little iron.

Example:


Taxonomy
Jamesonite, prismatic crystals, free encyclopedia, metallic mineral, sulfide minerals, search, formula, dark grey, acicular, one of the few, needle, moderate temperature, mineralogist, USA, Mineralogy, sulfide mineral, Iron minerals, Sulfosalt minerals.

Defination from the web:
Jamesonite. From Wikipedia, the free encyclopedia. Jump to: navigation, search. Jamesonite crystals. Jamesonite is a sulfosalt mineral, a lead, iron, antimony sulfide with formula Pb4FeSb6S14. ... "http://en.wikipedia.org/wiki/Jamesonite" Categories: Lead minerals | Iron minerals ...