Rhodocrosite Hillman Hall of Minerals and Gems
 
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Hematite pseudomorph after Magnetite
Patagonia, Argentina

CM28186 An outstanding specimen of arborescent (tree-like) crystals of hematite pseudomorphous after magnetite on octahedral crystals of the same from the Patagonia region of Argentina, 11.7 cm tall. Both hematite and magnetite are oxides of iron. This specimen was purchased from Wright's Rock Shop in 2003.