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Muscovite (Var: Schernikite) : KAl2(AlSi3O10)(OH)2

Copyright © www.MineralMovies.com (Jeffrey Fast)
 
 
minID: KEQ-HAD

Muscovite (Var: Schernikite) : KAl2(AlSi3O10)(OH)2

Copyright © www.MineralMovies.com (Jeffrey Fast)  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 3.4 cm x 3.1 cm x 2.4 cm

A peculiar variety of muscovite known only from the Gillette Quarry in Haddam Neck, Connecticut is known as schernikite. The crystals have a kind of ribbed columnar rim of tan mica with a lilac core. This 3.4 x 3.1 x 2.4 cm specimen is actually two such crystals...one is oriented vertically and the other at right angles. One of the nicest specimens of schernikite I have ever seen.

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Photo added: 30th Aug 2009