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Gypsum On Glauberite

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GND35762

Gypsum On Glauberite

Description Tabs

Description
Locality: 
Lake Bumbunga, Lochiel, Mount Lofty Ranges, South Australia, Australia
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.8 × 4.9 × 4.6 cm
Largest Crystal: 
3.00cm
Description

A good sized one of these lovely glauberite specimens. The glauberite is found in brines and mud of this salt lake and occurs as these fabulous rosettes of bladed crystals with bevilled edges.

Once exposed to the air, many of these specimens develop a coating of white powdery gypsum, which can add to the appearance depending on your viewpoint. No damage to even the edges of the crystals. Brilliant !

Mineral Data
What's on the rock

Gypsum

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

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
Gondwana Minerals
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