Kernowite is a mineral which was first described in 2020.

It is named for Cornwall, which in the Cornish language is Kernow.

Kernowite is a complex arsenate mineral with the composition Cu2Fe(AsO4(OH))4·4H2O.

[2] It was first described in 2020, and is closely related to liroconite, containing iron in the place of aluminium, making it green rather than blue.

[3][4] Its name is derived from Kernow, the name of Cornwall in the Cornish language, after being discovered in a rock mined c.1800 in the Wheal Gorland mine, St Day, Cornwall.