The Mineral annabergite
Annabergite is a rare nickel mineral that can often has a bright green color. It is the
end member of a series with Erythrite, with Annabergite being the nickel-dominant member and Erythrite being the cobalt-dominant member. Annabergite often contains some cobalt in its structure. The color caused by cobalt will dominate, and will cause some Annabergite to have a purplish color even if there is less cobalt than nickel present. Annabergite is named after the locality of Annaberg, Saxony, Germany, which is a type locality for this mineral.
Ni3(AsO4)2 · 8(H2O)
Bright green, apple-green, purplish-green, beige, gray, grayish-pink.
||Synonym of Annabergite. May also refer to the distinctly crystallized form that comes from Lavrion, Greece, or may refer to a magnesium-rich variety. Named after the Sierra Cabrera in Spain.
Annabergite is a minor ore of nickel in nickel deposits.
Annabergite is not a common mineral. The only significant specimen locality of Annabergite is Lavrion, Greece, where it occurs in small bright-green, yet visible crystals. Other Annabergite localities include Cobalt, Timiskaming District, Ontario, Canada; and Cottonwood Canyon, Humboldt County, Nevada.
Distingushing Similar Minerals
Due to the color, habits, and mode of occurrence of Annabergite, it is is not easily confused with other minerals.