Aurichalcite is a carbonate mineral, usually found as a secondary mineral in copper and zinc deposits. Its chemical formula is . The zinc to copper ratio is about 5:4.
Occurrence
Aurichalcite typically occurs in the oxidized zone of copper and zinc deposits.
Associated minerals include: rosasite, smithsonite, hemimorphite, hydrozincite, malachite and azurite. The crystal system is monoclinic.