what is hematite hematite is one of the most abundant minerals on earth 39;s surface and in the shallow crust. it is an iron oxide with a chemical composition of fe 2 o 3.it is a common rock-forming mineral found in sedimentary metamorphic and igneous rocks at locations throughout the world.. hematite is the most important ore of iron.although it was once mined at thousands of locations around
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hematite is the most important ore of iron and it has been used by people as a pigment for at least 40000 years. learn about the uses and properties of the mineral hematite.
hematite group.the iron analogue of corundum eskolaite and karelianite. hematite is rather variable in its appearance - it can be in reddish brown ocherous masses dark silvery-grey scaled masses silvery-grey to black crystals and dark-grey masses to name a few.
hematite is a primary component of ordinary rust but the porousity softness and flakyness of rust is likely due to goethite. the beautiful iridescent coating sometimes found on hematite is due to turgite still another "not really a" mineral composed of a mixture of hematite and goethite and sometimes described as being a hydrated hematite.
hematite was largely used in the past as a red and brown pigment although nowadays cheaper sources have been substituted. well formed hematite crystals are popular among mineral collectors and tumbled highly lustrous hematite from brazil makes a very popular inexpensive specimen for amateur collectors. hematite is also used as a minor gemstone.
hematite will leave a red to red-brown streak on the plate while magnetite will leave a black streak. ilmenite. ilmenite is a dense black metallic mineral that can be confused with metallic hematite but again the two mineral’s streak should serve to distinguish them.
hematite is one of the most common minerals. the color of most red and brown rock such as sandstone is caused by small amounts of hematite. it is also be responsible for the red color of many minerals. non-crystalline forms of hematite may be transformations of the mineral limonite that lost water possibly due to heat.