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    https://en.wikipedia.org › wiki › Malachite

    Malachite - Wikipedia

    • Malachite is a copper carbonate hydroxide mineral, with the formula Cu2CO3(OH)2. This opaque, green-banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses, in fractures and deep, underground spaces, where the water table and hydrothermal fluids provide the means for chemical pr… 展开

    Etymology and history

    The stone's name derives (via Latin: molochītis, Middle French: melochite, and Middle English melochites) from Greek Μολοχίτης λίθος molochites lithos, "mallow-green stone", from μολόχη molochē, variant of μαλάχη malāc… 展开

    Occurrence

    Malachite often results from the supergene weathering and oxidation of primary sulfidic copper ores, and is often found with azurite (Cu3(CO3)2(OH)2), goethite, and calcite. Except for its vibrant green color, the properties of mal… 展开

    Use

    Malachite was used as a mineral pigment in green paints from antiquity until c. 1800. The pigment is moderately lightfast, sensitive to acids, and varying in color. This natural form of green pigment has been replaced by its s… 展开

    Quelle est la beauté mystérieuse de la malachite ?
    Minerai très spectaculaire, la malachite est présente dans toutes les civilisations de l’antiquité. A l’état brut, elle fascine par son relief tourmenté et sa couleur de forêt amazonienne. Après polissage, les anneaux concentriques, les rubans clairs ou foncés révèlent toute la beauté mystérieuse de la pierre.
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