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Turquoise. Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula Cu Al 6( PO 4)4( OH)8·4 H 2 O. It is rare and valuable in finer grades and has been prized as a gemstone for millennia due to its hue.
On 24 June 2020, a new record for the world's largest rough tanzanite was set after a small-scale miner, Saniniu Laizer, mined two stones of 9.72 kg (21.4 lb) and 5.1 kg (11 lb) and sold them to the Government of Tanzania through Ministry of Mining for TSh 7.74 billion (US$3.35 million) [23] surpassing a record of 16,839 carats (3.37 kg; 7.42 ...
Howlite was discovered near Windsor, Nova Scotia, in 1868 by Henry How (1828–1879), a Canadian chemist, geologist, and mineralogist. [6] [7] How was alerted to the unknown mineral by miners in a gypsum quarry, who found it to be a nuisance. He called the new mineral silico-boro-calcite; it was given the name howlite by the American geologist ...
Mineral Park was a mining town, now a ghost town in the Mineral Park valley of the Cerbat Mountains in Mohave County, Arizona. [6] Its ruins and cemetery are now located within the property of the mine. [7] Mining in the area began in 1871 and a camp was established soon after. The mines produced primarily silver, gold, copper, lead and zinc.
SCZ. YVP. YMA. This is a partial list of ghost towns in Arizona in the United States. Most ghost towns in Arizona are former mining boomtowns that were abandoned when the mines closed. Those not set up as mining camps often became mills or supply points supporting nearby mining operations. [1]
Gemstones of the World revised 5th edition, 2013 by Walter Schumann ISBN 978-1454909538 Smithsonian Handbook: Gemstones by Cally Hall, 2nd ed. 2002 ISBN 978-0789489852 v
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