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Continue to ChatRocks & Minerals May Be Ugly on the Outside but Beautiful Inside the Rock https://blog.minimegeology.com/2016/09/13/some-rocks-minerals-may-be-ugly-on-the-outside-but-beautiful-on-the-inside/
Rocks & Minerals May Be Ugly on the Outside but Beautiful Inside the Rock https://blog.minimegeology.com/2016/09/13/some-rocks-minerals-may-be-ugly-on-the-outside-but-beautiful-on-the-inside/