![](http://www.alamy.com/thumbs/6/54CEA3F7-5AE2-4349-ACE4-952D7F036B82/2AD377T.jpg)
Sample of granulite. Granulite is a granular metamorphic rock mainly composed of feldspar. It is formed under high temperatures.
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Photo credit: © Science Photo Library / Alamy / Afripics
License: Licensed
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