These samples of creedite are displayed in the Smithsonian Museum of Natural History. Creedite is a sulfate mineral that contains fluorine with the composition Ca₃Al₂SO₄(OH)₂F₈.2H₂O. The sample at left is about 18 cm across and is from Santa Eulalia, Chihuahua, Mexico.

This sample of creedite is from Aktchatau, Balkhash, Kazakhstan. It is about 6x14 cm.