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Galena and Chalcopyrite - Zlatograd - Bulgaria - Giudiurska mine - Galena main ore of lead - Chalcopyrite main ore of copper
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Photo credit: © John Cancalosi / Alamy / Afripics
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Keywords: atomic, bulgaria, chemical, chemistry, collect, collection, composition, crust, crystal, crystallography, crystals, deposit, deposited, earth, economic, gem, geology, industrial, industry, metal, metallic, metallurgical, metallurgy, mineral, minerals, mining, molecule, natural, nature, ore, physical, physics, precious, resources, rock, sample, science, scientific, specimen, specimens, stone, structure, valuable