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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 ]
Azure spar, sometimes azur-spar, 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.
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 ...
Azurite has a dark, rich blue color - its formula, Cu3(CO3)2(OH)2, is very close to malachite. The blue color of azurite is from Cu+, while the green color of malachite is from Cu+2. Azurite & malachite almost invariably occur together, and are telling indicators of copper in the field, even in very small quantities.
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]
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A school of mines (or mining school) is an engineering school, often established in the 18th and 19th centuries, that originally focused on mining engineering and applied science. Most have been integrated within larger constructs such as mineral engineering , some no longer focusing primarily on mining subjects, while retaining the name.
A-State was founded as the First District Agricultural School in Jonesboro in 1909 by the Arkansas Legislature as a regional agricultural training school.Robert W. Glover, a Missionary Baptist pastor who served in both houses of the Arkansas Legislature from Sheridan (1905–1912), introduced in 1909 the resolution calling for the establishment of four state agricultural colleges, including ...