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Igneous rocks have crystals in them that range greatly in size. You'll also see black specs of mica, which is black and shiny. This crystals are created during the cooling process
http://answers.ask.com/Science/Nature/what_do_igne...
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Igneous rocks are found near volcanoes. Igneous rocks are formed out of molten lava from volcanoes that have erupted. The lava cools and forms the rocks.
http://answers.ask.com/Science/Nature/where_are_ig...
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Igneous rock is one of the main three sedimentary rocks found on Earth. This type of rock is typically formed from lava being cooled and then becoming solid after a volcano explosion
http://answers.ask.com/Science/Nature/what_is_igne...
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Igneous rocks are found in various paces over World. It is found near active or past active volcanic regions. It is formed due to cooling of Lava.
http://answers.ask.com/Science/Nature/where_are_ig...
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