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See how your rock is formed and where it fits in with the other rocks.

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There are over 700 different ones!

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Giant Causeway in Ireland. The lava cooled very slowly and this is how the rock particles had time to arrange themselves in these hexagonal shapes.

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The hat on this statue in Easter Island is made of scoria, a type of igneous rock.

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You can click on different parts of this diagram to learn more about the different types of rocks and how they are formed (click on the link):
http://www.learner.org/interactives/rockcycle/diagram.html

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Granite is used in construction, gravestones and statues. Obsidian was used to make arrowheads as well as other weapons and tools. Pumice is used to polish, in toothpaste, in concrete and to get rid of foot calluses.

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Can you find the igneous rocks in ApppState's virtual rock garden?

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Can you find the igneous rocks in ApppState's virtual rock garden?

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Take the virtual tour at http://mckinneymuseum.appstate.edu/rock-garden

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Obsidian is a smooth, black glassy rock that is formed by lava cooling very quickly, the crystals seen in other igneous rocks where not given the chance to assemble.

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The "Igni" part comes from the latin "fire", because these rocks come from volcanoes.