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Gummite

Copyright © Pavel M. Kartashov collection & photo
 
 
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Gummite

Copyright © Pavel M. Kartashov collection & photo  - This image is copyrighted. Unauthorized reproduction prohibited.

Bright yellow-orange pseudomorphoses of "Gummite" after cm-size crystal of former Broggerite. Composition of this gummite is very interesting - central orange part consist of thorian Curite, this oxide core is surrounded by yellow silicate rim composed from bright yellow Casolite and pale yellow Soddyite. Pegmatite matrix especially micas are penetrated by light-yellow films of later earthy Uranophane. Specimen size is 5x4 cm and its total radioactivity is ~690 μR/h. Collected in the end of 80th. Pavel M. Kartashov collection and photo.


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Photo added: 28th May 2008