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Gypsum is a very soft mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO ·2H O. (...) more....
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News about Gypsum from the twitter community...
Hopefully its lighter too! Thanks for RT @ecopond @GreenOm Eco replacement for gypsum drywall by Serious Materials http://bit.ly/t87qm
2009-06-12
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