Cowlesite

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Cowlesite
Cowlesite
General
Category	Tectosilicate minerals, zeolite group
Formula	Ca(Al2Si3)O10·5-6H2O
IMA symbol	Cow[1]
Strunz classification	8/J.24-10
Crystal system	Orthorhombic
Identification
Colour	Colourless, White
Mohs scale hardness	5-5.5
Luster	Vitreous

Cowlesite is a mineral named after American mineralogist John Cowles. W.S. Wise and Rudy W. Tschernich first described it in material from roadcuts along Neer Road, Goble, Oregon, United States. The description also incorporated data from Superior, Arizona. It most often occurs as small colorless to white spheres in basalt, and is often associated with other zeolites.

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