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Rock Hardness References Breaker Technology

Very Hard: . Asbestos rock. Soft limestone, Limestone Dolomite . Iron ore. Trap rock. Gravel Gabro, Iron ore (Taconite) Granite Grantic gravel. Trap rock, 1 .

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Iron Ore Facts SoftSchools

Iron ore is rock which metallic iron can be extracted from. Iron ore is the most common element in the world and makes up close to 5% of the Earth's crust.

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rocks Is this iron ore? Earth Science Stack Exchange

Sep 8, 2015 . Given the photographs and the additional information you gave in the comments, I would say that this is specular hematite. Hematite is iron ore.

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