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Hematite : Fe2O3, Magnetite : Fe2+Fe3+2O4

Copyright © Rob Lavinsky & irocks.com
 
 
minID: U95-70N

Hematite : Fe2O3, Magnetite : Fe2+Fe3+2O4

Copyright © Rob Lavinsky & irocks.com  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 3.4 cm x 2.7 cm x 2.4 cm

3.4 x 2.7 x 2.4 cm. A complete octahedron of magnetite has been replaced (pseudomorphed) by hematite, retaining the octahedral form of the original magnetite. You can see interesting concentric triangular-shaped terracing on the faces.


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Photo added: 22nd Apr 2008