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Azurite or Azure spar [5]: 14 is a soft, deep-blue copper mineral produced by weathering of copper ore deposits. During the early 19th century, it was also known as chessylite , after the type locality at Chessy-les-Mines near Lyon , France . [ 3 ]
The Rush Historic District is a zinc mining region of the Ozark Mountains in Arkansas. Now located within Buffalo National River , the district includes ruins dating from 1880 to 1940. The area was an important part of what became known as the North Arkansas Lead and Zinc District , and played a role in the development of railroads and modern ...
It is alternatively called azuromalachite, azurite-malachite and malachite-azurite. [2] Azurmalachite has a distinctive mottled green and blue coloration. It is relatively rare but can sometimes be found above copper deposits. The main sources for mined azurmalachite are the United States, France, and Namibia. [3]
Azure spar, sometimes azur-spar (German: Lazur spath, Blau spath) is a trivial and commercial, partly obsolete name for several of the most famous bright blue or blue-colored minerals, which also have similar names, most notably for lazurite and azurite, [1]: 14 and also for the less commonly used lazulite.
Pages in category "Mining in Arkansas" The following 14 pages are in this category, out of 14 total. This list may not reflect recent changes. 0–9.
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Bauxite is a city in Saline County, Arkansas, United States.Located within Central Arkansas, the city is named for bauxite, the source ore for aluminum, which was found in abundant quantities in the area and became a source of aluminium refining.
About 90 percent of American-mined bauxite has come from deposits in central Arkansas. The Arkansas deposits were formed during the Eocene from weathering of intrusions of nepheline syenite, an aluminium-rich, silicate-poor, igneous rock. Bauxite is still mined in Arkansas, but has not been mined for aluminium production since 1981.