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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 ]
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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The resource was first mined in 1898, 11 years after the State Geologist, John Branner, identified it in a sample from Pulaski County, Arkansas. In addition to the deposit in Pulaski County, south and east of Little Rock, there is a second deposit in Saline County, Arkansas close to Benton.
Associated minerals are quartz, limonite, azurite, malachite, cuprite, and other secondary copper minerals. It is typically found as botryoidal or rounded masses and crusts, or vein fillings. A 2006 study has produced evidence that chrysocolla may be a microscopic mixture of the copper hydroxide mineral spertiniite , amorphous silica and water.