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This is calcite, the same mineral that makes the clam shells that you find on the beach!
Perfect crystals of calcite allow you to do a special magic trick!
Last modified April 15, 2003 by Lisa Gardiner.
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The Fall 2010 issue of The Earth Scientist
, focuses on rocks and minerals, including articles on minerals and mining, the use of minerals in society, and rare earth minerals, and includes 3 posters!
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