Crushed Iron Ore Hardness

What is hematite hematite is one of the most abundant minerals on earths surface and in the shallow crustt is an iron oxide with a chemical composition of fe 2 o 3 is a common rock-forming mineral found in sedimentary, metamorphic, and igneous rocks at locations throughout the worldhematite is the most important ore of ironthough it was once mined at thousands of locations around.

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