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Rocks are mixtures of one or more minerals. Just like the apples, butter, flour, and sugar are the ingredients of apple pie, minerals like quartz, mica, and feldspar are the ingredients of an igneous (from the Latin word for fire) rock called granite.

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Igneous rocks (from the Greek word for fire) form from when hot, molten rock crystallizes and solidifies. The melt originates deep within the Earth near active plate boundaries or hot spots, then rises toward the surface. Igneous rocks are divided into two groups, intrusive or extrusive, depending upon where the molten rock solidifies.

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When magma rises to the surface of the Earth and hardens, it forms extrusive igneous rock.
Extrusive igneous rock tends to be glassy in texture because their formation occurs very rapidly.

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Rocks are classified by the way they form. Igneous rocks are those that form when magma cools and hardens. This process can occur on the Earth's surface or underground. The exact location of the formation of the rock determines the type of igneous rock it is

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Granite is a common rock that contains at least 25% quartz and is sometimes used in construction because of its strength.
Pumice is an unusual, lightweight rock formed when molten rock is rapidly blown out of a volcano, forming bubbles as it quickly loses pressure and cools at the same time.

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Examples of igneous rocks include basalt, granite, pumice, obsidian, tuff, diorite, gabbro and andesite.
Basalt forms the metamorphic rock granulite when subjected to extreme heat and pressure over time metamorphism.

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These atoms and molecule rearrange themselves into mineral grains as the magma cools, forming rock as the mineral grains grow together.There are over 700 different types of igneous rocks.

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Igneous rock is formed when magma cools and solidifies, it may do this above or below the Earth's surface.
Magma can be forced into rocks, blown out in volcanic explosions or forced to the surface as lava.

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The atoms and molecules of melted minerals are what make up magma.

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are formed at the crust's surface as a result of the partial melting of rocks within the mantle and crust.

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 They are formed by the cooling of molten magma on the earth's surface

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Extrusive igneous rocks cool and solidify quicker than intrusive igneous rocks. They are formed by the cooling of molten magma on the earth's surface

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Extrusive igneous rocks, also known as volcanic rocks, are formed at the crust's surface as a result of the partial melting of rocks within the mantle and crust.