Limonite is a yellow-brown mineral that is a mixture of various iron oxides and hydroxides, with the chemical formula 2Fe2O3H2O.
It is a common iron ore and is found in many locations around the world, including the United States, Australia, China, and Russia.
Limonite is typically formed through the weathering and oxidation of other iron-rich minerals and rocks.
The mineral is soft and can be easily scratched with a fingernail, making it unsuitable for use in most industrial applications.
However, it has been used historically as a pigment for paints, and as an ore for the production of iron and steel.
Limonite is often associated with other iron oxides, such as haematite and magnetite, and is typically found in bog and swampy areas.
The mineral is not commonly mined for commercial use, but can be used in small-scale iron production.
Limonite deposits are typically low-grade, meaning that they contain a lower concentration of iron than other iron ores like haematite and magnetite.
The mineral is also sometimes referred to as “brown iron ore” due to its characteristic coloration.

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