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Gypsum On Glauberite

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GND46302

Gypsum On Glauberite

Description Tabs

Description
Locality: 
Lake Bumbunga, Lochiel, Mount Lofty Ranges, South Australia, Australia
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.8 × 4.5 × 2.8 cm
Largest Crystal: 
2.50cm
Description

A very nice aesthetic specimen from this salt lake locality, 130 km north of Adelaide. Glauberite crystals forming lovely rosette formations have been coated in powdery snow white gypsum, an alteration product of contact with moist air. There is also a large single blade attached which makes the specimen in my opinion.

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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