Azurite
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Small JPG1200 x 843px — 129 KBLarge JPG2880 x 2022px — 537 KBFull-sized JPG4962 x 3484px — 1.2 MBOriginal fileTIFF — 4962 x 3484px — 11.9 MBAzurite is a copper carbonate hydroxide mineral renowned for its striking deep blue color and historical use in pigment production. It is produced by weathering of copper ore deposits, and its chemical formula is Cu₃(CO₃)2(OH)₂. Once referred to as "chessylite," it was also mentioned in Pliny the Elder's Naturalis Historia under the Greek name "kuanos."
Azurite is one of the two basic copper carbonate minerals, the other being bright green malachite. Simple copper carbonate (CuCO₃) is not known to exist in nature.
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Science History Institute. Azurite. Photograph, 2025. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/b0zhhpl.
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