a blue mineral, a hydrous copper carbonate, Cu 3 (CO 3 ) 2 (OH) 2 : an ore of copper.
a gem of moderate value cut from this mineral.

1810–20; azure + -ite1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
azurite (ˈæʒʊˌraɪt)
an azure-blue mineral associated with copper deposits. It is a source of copper. Composition: copper carbonate. Formula: Cu3(CO3)2(OH)2. Crystal structure: monoclinic

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
azurite   (āzh'ə-rīt')  Pronunciation Key 
A dark-blue monoclinic mineral occurring as a mass of crystals (an aggregate) or in the form of blades with wedge-shaped tips. It is often found together with the mineral malachite in copper deposits. Azurite is used as a source of copper, as a gemstone, and as a dye for paints and fabrics. Chemical formula: Cu3(CO3)2(OH)2.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica


basic copper carbonate [Cu3(OH)2(CO3)2]. It is ordinarily found with malachite in the oxidized zone of copper lodes. Notable deposits are Tsumeb, Namibia; Chessy, Fr.; and Bisbee, Ariz., U.S. Azurite was used as a blue pigment in ancient Eastern wall painting and, from the 15th to the middle of the 17th century, in European painting. For detailed physical properties, see carbonate mineral (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Some minerals can be recognized by their color: azurite is always a deep blue and malachite is green.
Mineralization generally occurs as bornite and chalcopyrite that has oxidized to azurite, malachite, and tenorite.
Mineralization consists principally of the copper carbonates, malachite, and azurite.
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