Galenite and quartz crystals

Galenite and quartz crystals

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Credit: DIRK WIERSMA/SCIENCE PHOTO LIBRARY

Caption: Galenite and quartz crystals. Sample of galenite (galena, grey) with quartz (white) crystals growing on it. Galenite is a lead sulphide and is the most important ore of lead. It occurs as a mass of dense, dark grey or glossy crystals and is one of the most abundant and widely distributed sulphide minerals. Galenite is a semiconductor and was used in early wireless communication systems as the crystal in crystal radio sets.

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Keywords: chemical, chemistry, close-up, crystal, crystal radio, crystal radios, crystalise, crystalised, crystalize, crystalized, crystalline, crystallise, crystallised, crystallising, crystallize, crystallized, crystallography, crystals, detail, earth science, galena, galenite, geological, geology, kohl, lead, lead sulphide, mineral, mineralogy, ore, quartz, semi conductor, semi-conductor, semiconductor, silica, silicon dioxide, specimen, still life, still-life

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