hematite goethite on pyrite
Hematite is the most important ore of iron and it has been used by people as a pigment for at least 40,000 years. Learn about the uses and properties of the mineral hematite. ... while highspecificgravity impurities such as pyrite sink. Finally, hematite is the material used to make polishing compounds known as "red rouge" and "jeweler''s ...