Mineralpedia Details for Annabergite
Annabergite
Named for the type locality in the Annaberg district of Saxony, Germany. Annabergite is an uncommon mineral that can be found in localities in, additionally, Slovakia, Austria, Spain, England, Scotland, Greece, Morocco, Iran, Bolivia, Mexico, the United States, Canada, Australia, and Japan, among several others. It is a secondary mineral that forms from the alteration of cobalt-nickel bearing arsenides and sulfides in oxidized hydrothermal deposits in association with erythrite, retgersite, gersdorffite, nickeline, maucherite, and nickelskutterudite.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/annabergite.pdf
- Formula
- Ni3(AsO4)2ยท8H2O
- Crystal System
- Monoclinic
- Crystal Habit
- Earthy, Encrustations, Massive
- Cleavage
- Perfect, None, None
- Luster
- Pearly
- Color
- apple green, greenish white, gray, yellow green, white
- Streak
- light green
- Class
- Monoclinic - Prismatic
- Fracture
- Brittle
- Hardness
- 2
- WebMineral
- View Annabergite
- Mindat
- View Annabergite
Annabergite from Aghbar mine, Bou Azzer, Anti - Atlas Mountains, Morocco
Very rich specimen with several groups of green, lath-like crystals of Annabergite to about 1mm.
Annabergite from Laurium, Attika, Greece
Thin bladed green Annabergite crystals to 1mm.
