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Romanèchite Psm Gypsum

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AST530840

Romanèchite Psm Gypsum

Pseudomorph

Description Tabs

Description
Locality: 
Kamariza Mines, Agios Konstantinos, Lavrion District, Attiki Prefecture, Greece
Class: 
Single Crystal
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.7 × 1.5 × 1 cm
Description

Perfect pseudomorph of romanechite after gypsum with minor calcite film coating.Crystal is hollow and terminated (hard to find terminations on such psm from Lavrion) with black color and high luster.

Mineral Data
What's on the rock

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

Gypsum

Formula: 
CaSO4·2H2O
Strunz: 
7.CD.40
Hardness: 
2.0
Streak: 
White.

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