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Glauberite

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PDM907855

Glauberite

Classic Locality

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Description
Locality: 
Consuelo Mine, Chinchón, Madrid, Spain
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 1.5 × 1 cm
Description

Razor sharp, gemmy crystals of glauberite with very good lustre and classical striations for prismatic developments. Mounted on an acrylic socle. These crystals are not primary but diagenetic, they are found lining geodes, without halite (such as those in Villarrubia de Santiago, the type locality), so these are very stable and less sensitive to air moisture.

I collected this specimen back in 2004 at the Consuelo mine, that produced long ago the world best glauberite crystals during the short period it was exploited at the XIX Century, from 1880 to 1889.

Combine specimens to reduce shipping costs!.

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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