Cu₁₉Cl₄SO₄(OH)₃₂.3H₂O

This sample of connellite is displayed in the Smithsonian Museum of Natural History. Connellite is a sulfate mineral of copper and chlorine with the composition Cu₁₉Cl₄SO₄(OH)₃₂.3H₂O. The sample at left is about 10 cm across and is from Bisbee, Arizona.