Calcite, quartz, and pyrite
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Photo credit: © naturephotos8 / Alamy / Afripics
License: Licensed
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Keywords: caco3, calcite, calcium, carbonate, close, crystal, crystals, fes₂, fools, gold, iron, metallic, mineral, minerals, oxygen, polymorph, pyrite, quartz, silicon, sio4, sulphide, tetrahedral, white