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Siderite : FeCO3, Calcite : CaCO3

Copyright © Rob Lavinsky & irocks.com
 
 
minID: LMU-02J

Siderite : FeCO3, Calcite : CaCO3

Copyright © Rob Lavinsky & irocks.com  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 4.1 cm x 3.4 cm x 3.4 cm

4.1 x 3.4 x 3.4 cm. This is a perfect sphere of siderite from Dalnegorsk - no flat areas, dings or contact, it really is perfect - and the trim job is perfect too, so it sits on just the right amount of matrix. Siderite is typically an accessory mineral on mineral specimen, infrequently remarkable enough to compose a specimen in and of itself - but this is certainly an exception!

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Photo added: 9th Sep 2007