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New page: thumb|300px'''Calcite''' is made of calcium carbonate (CaCO3). Generally white to clear, it is easily scratched with knife. Most seashells are made of...
[[Image:Calcite.jpg|thumb|300px]]'''Calcite''' is made of [[calcium carbonate]] (CaCO3). Generally [[white]] to [[clear]], it is easily scratched with knife. Most [[seashell]]s are made of calcite or related minerals. This is the 'lime' of [[limestone]].<ref>http://wrgis.wr.usgs.gov/docs/parks/rxmin/mineral.html#amphibole</ref>
==References==
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[[Category:Geology]]
==References==
<references/>
[[Category:Geology]]