mineral
Malachite and Cuprite on Host Rock
Cu2CO3(OH)2 (Malachite) and Cu2O (Cuprite)
Malachite has a Mohs hardness of 3.5 to 4, vibrant green color, vitreous to silky luster, and a monoclinic crystal system. Cuprite has a Mohs hardness of 3.5 to 4, dark red to brownish-red color, and adamantine to submetallic luster.
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Physical properties
Malachite has a Mohs hardness of 3.5 to 4, vibrant green color, vitreous to silky luster, and a monoclinic crystal system. Cuprite has a Mohs hardness of 3.5 to 4, dark red to brownish-red color, and adamantine to submetallic luster.
Formation & geological history
Formed in the oxidation zones of copper ore deposits, typically created through the weathering and alteration of primary copper sulfides.
Uses & applications
Used as an important copper ore, carved into ornamental objects, polished into cabochons for jewelry, and sought after by mineral collectors.
Geological facts
Malachite has been used as a gemstone and ornamental stone for thousands of years, and was even ground into powder for green paint in ancient times.
Field identification & locations
Easily identifiable in the field by its striking bright green staining and crusts associated with reddish-brown copper oxides, commonly found in major copper-producing regions worldwide.
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