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Can you help make this a better article? What good localities have we missed? Can you supply pictures of better specimens than those we show here? Can you give us more and better information about the specimens from these localities? Can you supply better geological or historical information on these localities?
There are huge gypsum deposits in the Paris basin ("plaster of Paris"). Some fine crystals continue to be found around Paris. Parts of the city are underlain by underground gypsum mines (largely abandoned I believe). This 16-centimeter twinned crystal was dug up in the Montmarte District during installation of an underground electric cable in about 1997.