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Jarosite Natrojarosite & Romanèchite

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AST107744

Jarosite Natrojarosite & Romanèchite

Description Tabs

Description
Locality: 
Kamariza Mines, Agios Konstantinos, Lavrion District, Attiki Prefecture, Greece
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4 × 3 cm
Description

Very aesthetic specimen of sparkling brown jarosite crystals light brown natrojarosite and lead gray romanechite.From a quite recent find at Lavrion.

Mineral Data
What's on the rock

Jarosite

Formula: 
KFe3+ 3(SO4)2(OH)6
Strunz: 
7.BC.10
Crystal System: 
Trigonal - Pyramidal Class
Hardness: 
2.5 - 3.5
Type Locality: 
Jaroso Ravine, Sierra Almagrera, Cuevas del Almanzora (Cuevas de Vera), Almería, Andalusia, Spain

Natrojarosite

Formula: 
NaFe3(SO4)2(OH)6
Strunz: 
7.BC.10
Hardness: 
2.5 - 3.5
Type Locality: 
Soda Springs Valley, Mineral Co., Nevada, USA

Romanèchite

Formula: 
(Ba,H2O)2Mn5O10
Strunz: 
4.DK.10
Hardness: 
5.0 - 6.0
Type Locality: 
Manganese deposit, Romanèche-Thorens, La Chapelle-de-Guinchay, Saône-et-Loire, Burgundy, France

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