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Glauberite

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TPX941966

Glauberite

Classic Locality

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Description
Locality: 
Consuelo Mine, Chinchón, Madrid, Spain
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.8 × 2.8 × 2.5 cm
Weight: 
13.00gr
Description

Spectacular group of glauberite crystals from this famous deposit that is between San Martín de la Vega and Chinchón in the province of Madrid. I found these specimens in 2004 and today it is impossible to enter the mine because It is already a protected area.
I want to point out that these pieces are the same as when they came out of the mine 18 years ago, the condition for them to continue like this is that they do not come into contact with water at all, otherwise the crystals will acquire after a short time a colored crust opaque and earthy white which will make the piece lose all interest in collecting.

Mineral Data
What's on the rock

Glauberite

Formula: 
Na2Ca(SO4)2
Strunz: 
7.AD.25
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.0
Streak: 
White
Type Locality: 
El Castellar Mine, Villarrubia de Santiago, Ocaña, Toledo, Castile-La Mancha, Spain

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