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• n  a salt or ester of carbonic acid (containing the anion CO3)
• v  turn into a carbonate
• v  treat with carbon dioxide

• Barefoot says that it's limestone from dead parts of Okinawa's coral reefs, actually calcium carbonate containing some trace minerals and practically the same as the pure calcium .
• He prescribed a dose of calcium carbonate; two weeks later, his sister's pain had disappeared.
• It's home to 73 million metric tons of lithium carbonate, more than half the world's supply.

News & Articles

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• Research and Markets: Saudi Arabia Trade of Calcium Carbonate: Import, Export, Market Prospects
  Research and Markets has announced the addition of the "Saudi Arabia Trade of Calcium Carbonate: Import, Export, Ma
  June 11, 2013 - Business Wire via Yahoo! Finance
• Predicting the future of coral reefs in a changing world
  Scientists have described for the first time the biological process of how corals create their skeletons, which form massive and ecologically vital coral reefs in the world's oceans. They identified specific proteins secreted by corals that precipitate carbonate to form the corals' characteristic skeleton.
  June 6, 2013 - Science Daily
• Rutgers findings may predict the future of coral reefs in a changing world
  ( Rutgers University ) Rutgers scientists have described for the first time the biological process of how corals create their skeletons, which form massive and ecologically vital coral reefs in the world's oceans. They identified specific proteins secreted by corals that precipitate carbonate to form the corals' characteristic skeleton.
  June 6, 2013 - EurekAlert!

Quotes

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• Nicholas Stern in guardian.co.uk
  Such a rapid change has not happened for hundreds of thousands of years and "makes it harder for many ocean creatures to form shells and skeletons from calcium carbonate", Stern says.
• Sandrin in Arizona State University
  Kartchner Caverns is widely recognized as a spectacular example of carbonate cave development,says Sandrin. "The cave is one of the top 10 caves in the world in terms of mineralogical and speleothem development. The caverns represent an...
• Steve Squyres in About - News & Issues (blog)
  The beauty is we know how to find out,said Dr. Steve Squyres of Cornell University, Ithaca, NY, principal investigator for the mission. "Is the carbonate concentrated in fluffy dust? That might favor the atmospheric hypothesis. Is it...