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

Copyright © Rob Lavinsky & irocks.com
 
 
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Hematite : Fe2O3, Magnetite : Fe2+Fe3+2O4

Copyright © Rob Lavinsky & irocks.com  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 7.9 cm x 5.1 cm x 3.1 cm

7.9 x 5.1 x 3.1 cm. This is a complete floater that features several stacked octahedrons of lustrous, dark metallic hematite after magnetite. The octahedrons reach 2.5 cm across and if you observe carefully, the three crystals on top of the stack exhibit incipient hopper growth though not so much that they mar the octahedral form as yet. This is a pristine floater, complete all around, with better lustre in person than appears here!


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Photo added: 5th Apr 2008