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The Collaborative International Dictionary
Liroconite

Liroconite \Li*roc"o*nite\ (l[-i]*r[o^]k"[-o]*n[imac]t), n. [Gr. leiro`s pale + koni`a powder.] (Min.) A hydrated arseniate of copper, occurring in obtuse pyramidal crystals of a sky-blue or verdigris-green color.

Wiktionary
liroconite

n. (context mineralogy English) A complex vitreous monoclinic mineral, hydrated copper aluminium arsenate hydroxide, with a bright blue or green colour.

Wikipedia
Liroconite

Liroconite is a complex mineral: Hydrated copper aluminium arsenate hydroxide, with the formula Cu Al[(OH)| As O]ยท4(HO). It is a vitreous monoclinic mineral, colored bright blue to green, often associated with malachite, azurite, olivenite, and clinoclase. It is quite soft, with a Mohs hardness of 2 - 2.5, and has a specific gravity of 2.9 - 3.0. It was first identified in 1825 in the tin and copper mines of Devon and Cornwall, England. Although it remains quite rare it has subsequently been identified in a variety of locations including France, Germany, Australia, New Jersey and California.

The type locality for Liroconite is Wheal Gorland in St Day, Cornwall in the United Kingdom.

It occurs as a secondary mineral in copper deposits in association with olivenite, chalcophyllite, clinoclase, cornwallite, strashimirite, malachite, cuprite and limonite.