Earth's Archive

Monthly Archive: December Eart

Earth's Archives: Every Rock Tells a Story Part 1

Posted: April 13, 2015 - 12:52 , by Sarah Horsfall
Hematite

Hermatite

By: Ian Nicklin

Hematite is a common ore of iron that was extensively mined in northern England in the 19th century. The miners referrred to globular aggregates of hematite, such as this, as "kidney-ore" since it reminded them of the organ. We call this shape "reniform," which means the same thing: kidney-shaped.