 : Azurite-Malachite
Specimen of azurite-malachite, which is a naturally-occurring mixture of the vivid royal-blue, or "azure" mineral known as azurite (chessylite), and bright-green malachite. Azurite and malachite are combined in a geological process known as syngenesis.
Azurite-malachite is typically found within copper deposits of the desert southwest United States, primarily in Arizona. Azurite is a hydroxide-containing member of the copper carbonate class of mineral, which has a massive, nodular or tabular habit, often occurring in stalactitic form with prismatic crystals.
Azurite has been used as a blue pigment for centuries, and the name "azurite" was derived from the Arabic word azul, meaning "blue," and the Persian word lazhward, meaning "blue stone," or "stone of azure." Azurite-Malachite is also found in Africa, Australia, Chile and France.
Azurite Chemistry, Physical Properties
Azurite Optical Properties
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