It is formed from the oxidation of copper ore minerals along with other oxidation zone minerals. Brochantite is similar to other fibrous green copper minerals that form in oxidation zones such as the carbonate mineral malachite, the halide mineral atacamite and the closely related sulfate mineral antlerite.

Where is Brochantite found?

The mineral is found in a number of locations around the world, notably the southwestern United States (especially Arizona), Serifos in Greece and Chile. Brochantite is a common corrosion product on bronze sculptures located in urban areas, where atmospheric sulfur dioxide (a common pollutant) is present.

What is the chemical formula for Brochantite?

Brochantite, a copper sulfate mineral, its chemical formula being Cu₄SO₄(OH)₆. It is ordinarily found in association with malachite, azurite, and other copper minerals in the oxidized zone of copper deposits, particularly in arid regions.