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Where does mica come from?

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Quick Answer

Mica is a metamorphic mineral that comes from volcanoes and hydrothermal vents. It is easily recognized by its thin crystal layers that peel off in sheets. Mica is very shiny and is responsible for the glittery effect in composite rocks such as granite, gneiss and slate.

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Where does mica come from?
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Full Answer

Mica is composed of silicon and oxygen. Biotite, muscovite and boromuscovite are three common variations. Mica is an excellent insulator and has many electrical applications. Mica is white, yellowish, green or gray, and can be found on most continents. The largest deposits are found in India, South Dakota, Russia and Brazil. In addition to its use in electronics, mica has many artistic applications.

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  • Q:

    How is mica formed?

    A:

    There is no definitive evidence to fully explain the formation of mica as the process is still under scientific study as of 2015. However, mica formation is said to be closely associated with the lack of orthoclase feldspar in pegmatites, which is where the mineral is predominantly found.

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  • Q:

    Where does graphite come from?

    A:

    Graphite is normally found in the form of flakes in metamorphosed rocks. The rocks in which graphite is found are rich sources of carbon and other carbon-containing compounds. Graphite is a carbon allotrope and is also obtained from veins and in pegmatites.

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    How many volcanoes are in Hawaii?

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    There are five active volcanoes in Hawaii: Lo'ihi, Kilauea, Mauna Loa, Hualalai and Haleakala. Lo'ihi is an underwater volcano; the other four volcanoes are above sea level.

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  • Q:

    Where does magma come from?

    A:

    Magma comes from the top part of the Earth's mantle and from the bottom portion of the Earth's crust. Molten magma is created in different ways and can be formed through the transfer of heat, decompression melting and flux melting. Magma consists of four parts; it is a semi-molten rock mix and is commonly made of dissolved gases, solid rocks, mineralized crystals and a hot liquid base.

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