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Romanèchite Psm Selenite & Calcite

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PFK783836

Romanèchite Psm Selenite & Calcite

Classic Locality

Description Tabs

Description
Locality: 
Hilarion Mine, Hilarion, Kamariza, Agios Konstantinos, Lavrion District, Attiki Prefecture, Greece
Class: 
Single Crystal
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.6 × 1.3 × 1 cm
Description

Beautiful pseudomorph of a manganese oxide mineral (probably romanechite but it is not analyzed) after a thin and elongated crystal of gypsum with bubbly formations on the periphery, associated with minor calcite.

ex Konstantinos Papaspyropoulos collection

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

Selenite

Variety Of: 

Gypsum

Formula: 
CaSO4·2H2O
Strunz: 
7.CD.40
Hardness: 
2.0
Hardness: 
0.0

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

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