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The most important sources of sheet mica are pegmatite deposits. Sheet mica prices vary with grade and can range from less than $1 per kilogram for low-quality mica to more than $2,000 per kilogram for the highest quality. [21] In Madagascar [22] and India, [23] it is also mined artisanally, in poor working conditions and with the help of child ...
It was announced in 2010 that about $1 trillion in untapped mineral deposits were identified in Afghanistan, [29] [30] enough to fundamentally alter the Afghan economy. According to other reports the total mineral riches of Afghanistan may be worth over $3 trillion US dollars.
[1] As of 2012, India is the largest producer of sheet mica, 2015 the fourth largest producer of iron ore, alumina, chromite, and bauxite in the world. A coal and iron ore project is in the fifth largest reserve in world. India's metal and mining industry was estimated to be $106.4 billion in 2010. [2]
Muscovite (also known as common mica, isinglass, or potash mica [6]) is a hydrated phyllosilicate mineral of aluminium and potassium with formula KAl 2 (AlSi 3 O 10)(F,OH) 2, or 2 (Al 2 O 3) 3 (SiO 2) 6 (H 2 O). It has a highly perfect basal cleavage yielding remarkably thin laminae (sheets) which are often highly elastic.
A pegmatite is an igneous rock showing a very coarse texture, with large interlocking crystals usually greater in size than 1 cm (0.4 in) and sometimes greater than 1 meter (3 ft). Most pegmatites are composed of quartz , feldspar , and mica , having a similar silicic composition to granite .
Materials recovered by mining in the country include oil, with proved reserves of 1,506,000,000 bbl (239,400,000 m 3) (2006 estimate) and natural gas, with annual production of 6.18 billion m 3 (2004 estimate) and reserves of 114.4 billion m 3 (1 January 2005 estimate). [1]
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A field [1] [failed verification] is a mineral deposit containing a metal or other valuable resources in a cost-competitive concentration. It is usually used in the context of a mineral deposit from which it is convenient to extract its metallic component.