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Barrerite is a tectosilicate mineral and a member of the zeolite family. It is one of the rarer zeolites and found only at Rocky Pass, Kuiu Island, Alaska. It was named for Richard Maling Barrer (1910-1996), a British teacher born in New Zealand.
Barrerite crystal are white to pinkish, with a vitreous-glassy luster. The crystal system is orthorhombic and is flat and tabular in appearance. It has a Mohs hardness of 3 to 4 and its cleavage is perfect. Barrerite has a white streak and a density of 2.13.
1. ^ http://webmineral.com/data/Barrerite.shtml Webmineral data