Galena

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Galena is the primary ore mineral of lead. Worked for its lead content as early as 3000 BC, it is found in ore veins with sphalerite, pyrite, chalcopyrite, tennantite-tetrahedrite, etc. and in skarns, as well as in sedimentary rocks where it may replace carbonate beds or be deposited in pore spaces.

Galena specimens may tarnish when exposed to air, becoming dull in luster. Freshly cleaved specimens exhibit a strong metallic luster, but over time the luster turns more dull, although still metallic. The tarnish can be removed by scrubbing the specimen with water and mild soap.

Galena specimens must be taken care of more so then other minerals. They are easily damaged, and well formed crystals may shatter into small crystal fragments if put under slight pressure or dropped, so care should be taken when handling and transporting Galena specimens.