Annabergita
Annabergita is a mineral with formula Ni₃(AsO₄)₂·8H₂O, in the Arseniatos group. This specimen comes from Mina Km 3 a Cielo Abierto, Lavreotiki, East Attica, Ática, Grecia and joined the Terrium collection in 2025.
Description
Elongate, rectangular piece with intense grass-green annabergite as microbotryoidal aggregates on white quartz.
About Annabergita
Annabergite forms as a secondary mineral when nickel minerals alter in oxidised environments. Its intense green colour is unmistakable and much appreciated by collectors. It usually occurs as small crystals or bright crusts on light-coloured matrices. It is the nickel analogue of erythrite, sharing form but not colour. And erythrite is the cobalt version of vivianite.
About the locality
Lavrion, Greece, is one of the classic European localities for annabergite. At the Km 3 open pit mine, well-crystallised specimens with vivid hues and frequent associations with quartz, calcite or aragonite have been found. Mining at Lavrion dates back to classical antiquity; it supplied the silver that financed the wars against Sparta. Annabergite has been collected mainly since the 19th century.
Technical data
- Catalogue No.
- 0028
- Composition
- Ni₃(AsO₄)₂·8H₂O
- Name
- Annabergita
- Group
- Arseniatos
- Category
- Cavella
- Matrix
- Cuarzo
- Mine
- Mina Km 3 a Cielo Abierto
- District / Municipality
- Lavreotiki
- Province
- East Attica
- Region
- Ática
- Country
- Grecia
- Size (cm)
- 5 x 2.8 x 2.2
- Weight
- 44.8 g
- Acquired
- 2025
- Etymology
- The name "annabergite" comes from Annaberg, a locality in the Ore Mountains, Saxony (Germany), where it was first described in 1758.
- Quality
- Buena
- Value trend
- Estable
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