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Gypsum On Glauberite

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GND86330

Gypsum On Glauberite

Description Tabs

Description
Locality: 
Lake Bumbunga, Lochiel, Mount Lofty Ranges, South Australia, Australia
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.4 × 4.7 × 4.6 cm
Description

These crystal groups were first found in the early 1990's in the marls of this small salt lake. In some specimens the glauberite alters to a film of gypsum on the surface giving the specimens a striking snow like coating.

Some very slight chipping on crystal edges as seen in photos.

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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