Hematite is a type of precious Stone that consists of the group of iron oxides. The name Hematite comes from the Greek word "haima" It has been taken to mean blood, due to the red color of some hematite samples, which indicates blood. Hematite has a crystalline structure and is usually found in red, brown and gray colors. Chemically, hematite is iron oxide (Fe2O3). Mineralogically, this material is found in sedimentary rocks, iron ores and volcanic rocks. Hematite is used in industry as the main source of iron for the production of steel, and due to its strong magnetic properties, it plays an important role in the manufacture of electromagnetic components. a

Limonite and magnetite are two other types of iron mineral sources that are mined. Limonite is obtained from the hematite group and is usually found in sedimentary mines. Magnetite also belongs to the group of iron oxides, and the main element of iron in it is magnetite (Fe3O4). This mineral source is also found in sedimentary Rocks and iron ores. Hematite usually consists of Z aqueous sediments. Over time, iron particles that contain iron from rocks, soil and other materials in the margins of rivers and lakes gradually accumulate with Chemical and physical processes under pressure and temperature. This accumulation of particles is in the form of smooth iron deposits or in the form of thick layers that include hematite. These sediments turn into hematite stone over time.

Hematite can also be formed in the metabolic process of some living organisms. For example, in some aquatic environments, organisms such as bacteria and aquatic plants can reduce Oxygen and extract iron from its dissolved forms. This process causes the formation of hematite deposits in the environment. Since hematite is one of the iron oxides, the processes of oxidation and chemical analysis of iron can play a role. Also, factors such as temperature, pressure, time and chemical environment also affect the formation of hematite

Some signs and symptoms in nature can be mentioned that may indicate the presence of hematite mineral. Of course, the exact diagnosis of the presence of hematite requires scientific investigation and careful analysis by mineralogists. Hematite is usually red, brown and sometimes gray in color. Therefore, the presence of similar colors in the Stones and soils of the environment can be a sign of the presence of hematite. Hematite has a high iron content. Therefore, if soil, water, or other rocks suddenly turn brown or red near a hematite mine, this can be a sign of the presence of iron and hematite.

Hematite has magnetic properties. If a stone is associated with significant magnetic strength in nature, this can indicate the presence of hematite. Hematite is formed as a sedimentary rock, so the presence of red or brown sedimentary rocks in rivers and sedimentary areas can be a sign of hematite. Accurate diagnosis of the presence of hematite requires scientific and laboratory investigations, and for better assurance, it is recommended to refer to mineral and geological experts.

Hematite is also used in Jewelry making and is considered as a precious stone due to its beautiful color and transparency. But it should be noted that not all hematite samples can be turned into jewelry and there is a great variety in their quality and value. The most important mineral source for iron extraction is hematite. Hematite is the main source of iron for Steel production and is found in sedimentary rocks and iron ores. Some of the important hematite mines include mines in different countries such as Australia, Brazil, India, China, Russia and America.