Crystals from around the world highlight the crystallographic and geographical diversity of naturally occurring gypsum. These include amazing spearhead crystals–the most distinctive, but also the rarest, from of gypsum.  Over 3,000 fossils from the Paris Basin, which are contemporaneous with the formation of gypsum during the tertiary era, constitute a valuable collection for paleontology investigations (Mandil and Turgis collections). The Cormeilles quarry presents a precise image of the...
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