Galena is lead sulfide, PbS, a dense isometric mineral known for metallic lead-gray cubes, perfect cubic cleavage and its historic importance as the principal ore of lead; careful handling is...
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Chalcopyrite is copper iron sulfide, CuFeS2, a brass-yellow tetragonal mineral and one of the world's most important copper ores, often developing colorful iridescent tarnish. Explore its mineral science, mining importance,...
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