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Download hereGENERAL DESCRIPTION
Goosecreekite is a rare hydrated calcium aluminosilicate, which belongs to the zeolites group.
Colourless to white, goosecreekite has a vitreous luster. It forms isofoundric crystals, often strongly curved, which can reach 4 cm.
Apart from the type-locality of Goose Creek in Virginia as well as California (USA), goosecreekite is found also in Germany (Bavaria), Hungary (Üllés) and Norway (Lom). But it is from Nasik, in the state of Mahashtra in India that the most beautiful samples are arising.
The types are kept in the following institutions: American Museum of Natural History of New York, the University from Harvard in Cambridge, the National Museum of Natural History of Washington, the Canadian Geological Survey, in Ottawa, the Royal Ontario Museum of Toronto and the Natural History Museum of London.
HISTORY : Named after its type-locality : Goose Creek
Species first described in 1980 by Dunn and al.
Type-locality: Goose Creek quarry, Loudoun Co., Virginia, USA
CHEMICAL FORMULA : Ca Al2 Si6O16 5H2O
CRYSTAL SYSTEM : Monoclinic
COLOR : Colorless, white
DIAPHANIETY : Transparent
LUSTER : Vitreous, pearly
STREAK : White
MORPHOLOGIE : Polycrystalline aggregates, isometric crystals
HARDNESS : 4,5
CHEMICAL CLASS: 2,23
DENSITY : VIII - Silicates
GROUP : Heulandite - brewsterite series
STRUNZ CLASS BEFORE 2001 : 8/J.23-60
STRUNZ CLASS AFTER 2001 : 9.GE.05
