Na₂ZrSi₃O₉.2H₂O

These samples of catapleiite are displayed in the Smithsonian Museum of Natural History. Catapleiite is a silicate mineral that contains zirconium with the composition Na₂ZrSi₃O₉.2H₂O. The samples are on the order of 5 cm across and are from Mont Saint-Hilaire, Quebec, Canada.