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Cronstedtite

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Cronstedtite

Classic Locality

Description Tabs

Description
Locality: 
Herja Mine, Chiuzbaia, Baia Mare, Maramureș County, Romania
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 4.5 × 2.7 cm
Description

Very nice for locality specimen of black, lustrous crystals of rare Cronstedtite with small Quartz crystals on Pyrite rich matrix from famous Herja Mine (Romania). Rarely seen nowadays. Ex coll. H. Drygalski (1929-2005).

Mineral Data
What's on the rock

Cronstedtite

Formula: 
Fe2+2Fe3+((Si,Fe3+)2O5)(OH)4
Strunz: 
9.ED.15
Crystal System: 
Monoclinic, Trigonal, Hexagonal
Hardness: 
3.5
Type Locality: 
Příbram, Central Bohemia Region, Bohemia (Böhmen; Boehmen), Czech Republic

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