Sky blue georgeite associated to blue chalconatronite. From: Carr Boyd Rocks Mine, Menangina Station, Menzies Shire, Western Australia, Australia. — Photo: David Hospital · CC BY-SA 4.0
Georgeite
An extremely rare amorphous copper hydroxycarbonate — pale-blue powdery coatings in oxidized copper ores, identified in 1979.
Intro adapted from Wikipedia (CC BY-SA).
Georgeite is an IMA-recognized mineral species in the carbonate class, with the chemical formula Cu₂(CO₃)(OH)₂.
It is a member of the Amorphous structural group.
Key properties: specific gravity 2.55; Very pale blue streak; Vitreous to earthy luster.
IMA symbol Gg, IMA status: approved, named in 1977.
Found as a rare secondary mineral in oxidized portions of a Ni–Cu sulfide deposit.
It is found associated with Malachite, chalconatronite, nickelian magnesite, gypsum.
The mineral was named to honor George Herbert Payne (1912–1989), Chief of the Mineral Division, Government Chemical Laboratories, Perth, Western Australia.