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Muscovite (Var: Illite) : K0.65Al2.0[Al0.65Si3.35O10](OH)2

Copyright © DSW 2011
 
 
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Muscovite (Var: Illite) : K0.65Al2.0[Al0.65Si3.35O10](OH)2

Copyright © DSW 2011  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 10.2 cm x 7 cm x 0.7 cm

Interesting pseudomorph: a thin plate of matrix is scattered with numerous hoppered cubic halite crystals to 9 mm on edge, these replaced by clay. Per previous labels and other entries, this has been ID'ed as illite.

10.2 x 7.0 x 0.7 cm

Don Windeler collection, acquired in 2007 from Dan Weinrich. Previously in the Scott Williams collection, with label noting it was collected in 1975.


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Photo added: 9th Jan 2011