What do igneous rocks look like?
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When you hold an igneous rock, the rock you hold in your hand is one of the oldest things in the world. Igneous rocks are formed from lava, magma or ash from a volcanic eruption or flow . Igneous rocks have distinctive properties that can help you distinguish them from other types of rocks, and identify the specific type of igneous rock you have.
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Extrusive, or volcanic, igneous rocks look dull and do not sparkle much because they are fine grained. If the magma stays inside the earth and takes thousands of years to cool, it has time to make big crystals.
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