Liroconite, a copper aluminum arsenate hydroxide hydrate mineral, was found by Ewald Gerstmann, and crystals were verified using X-ray methods. Liroconite was found as bright-blue, subhedral, 1 mm crystals on a vein surface from Sterling Hill. Associated minerals were sonolite, calcite, and secondary willemite. It has not been reported from Franklin. (Dunn, 1995)

 Location Found: Ogdensburg
 Formula: Cu2Al(AsO4)(OH)4 · 4H2O
 Essential Elements: Aluminum, Arsenic, Copper, Hydrogen, Oxygen
 All Elements in Formula: Aluminum, Arsenic, Copper, Hydrogen, Oxygen
 IMA Status: Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
 To find out more about this mineral at minDat's website, follow this link   Liroconite

Dunn, Pete J. (1995). Franklin and Sterling Hill New Jersey: the world's most magnificent mineral deposits. Franklin, NJ.: The Franklin-Ogdensburg Mineralogical Society. p.671

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