Cornwallite

Facts

Chemical formula

Cu₅(AsO₄)₂(OH)₄

Crystal system

Monoclinic

Mohs hardness

4.5

Elements in formula

Copper, Arsenic, Oxygen, Hydrogen

Number of elements

4

IMA status

Grandfathered

Type locality

Wheal Gorland

Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q3693802