Rare and valuable minerals

How does a person use the dolomite rock?

Dolomite bothers you a lot? What is dolomite? Is it a mineral or a stone? Where can I find it? Is it the same as limestone or marble? It is harmful? Read this blog to find answers in 2 minutes.

What is Dolomite?

  • Geologists believe that dolomite is an anhydrous carbonate mineral, containing 60% calcium carbonate and 40% magnesium carbonate. However, it may also contain purities such as iron, manganese and lead.
  • In rock mineralogy dolomite is used as a sedimentary rock , in which the mineral dolomite predominates. To avoid this ambiguity, the term “dolostone” is preferred. Dolomite rock is composed of the mineral dolomite, but also contains impurities such as calcite, quartz and feldspar.
  • Dolomite formula: CaMg (CO3)2
  • Composition: calcium and magnesium carbonate. Sometimes small amounts of iron and manganese are also present.
  • Related Minerals: quartz, fluorspar, galena, chalcopyrite, pyrite, magnesite, clay, gypsum, barite, feldspar, sphalerite, etc.
  • Dolomite color: pure white; iron-containing gray; weathered brown. Colorless, white (pure), gray (iron), peach, pink (manganese) and brown (weathered). Yellow, green, red, black and blue dolomite are rare.
  • Shine of dolomite: glass, mother-of-pearl
  • Dolomite hardness: 3,5 to 4 (very soft, but harder than marble and limestone)
  • Specific gravity of dolomite: 2,8 – 3,0 Feet
  • Dolomite crystal: trigonal system. The crystal is rhombohedral, the crystal plane is often curved in the form of a saddle, and polycrystalline twins are often found. The aggregates are usually granular.
  • Soluble or not: Slightly soluble.
  • Dolomite cost. In most cases, it is cheaper than marble, quartz and granite (in some cases).

Dolomite is very valuable from an economic point of view. Since its properties are similar to those of limestone, in places where limestone is unavailable or more expensive, we often process dolomite to produce most construction materials such as road base materials, concrete and asphalt aggregates, crushed stone, cement, etc.

Of course, we also use dolomite as a source of magnesium oxide (MgO), agricultural fertilizers, glass, bricks and ceramics.

Where is dolomite mined?

Dolostone occurs in the same sedimentary environment as limestone—a warm, shallow seawater environment.

Most dolomite-bearing rocks were originally deposited as calcium carbonate oozes. They accumulated in the form of shell fragments, fecal material, coral fragments and carbonate sediments.

The dolomite rock is believed to have formed resulting from alteration of calcareous silt and limestone by post-depositional magnesium-rich groundwater.

Where to find dolomite? Dolomite rock is found throughout the world. The most famous quarries are located in the Midwestern United States, Ontario, Canada, Switzerland, Pamplona, ​​Spain and Mexico.

In addition, Italy has the famous Dolomites mountain, which is made of dolomite rock.

Dolomite limestone?

Many people believe that dolomite and limestone are very similar, as they are both sedimentary carbonate rocks with similar appearance and uses. So, is dolomite limestone?

Answer: NO.

Dolomite rock (dolostone) is often found together with limestone. Between them there are several transitional rock types. The geological process of converting calcite into dolomite is called dolomitization. Any intermediate product is called dolomitic limestone. Currently, dolomite is a type of limestone.

  • Amount of magnesium contained. The mineral dolomite is a calcium and magnesium carbonate mineral (dolomite) with less than 5% calcite content. However, limestone is a calcium carbonate mineral composed of calcite (CaCO3 ).
  • Dolomite harderlimestone (hardness 2-4 on the Mohs scale).
  • Sand, clay and silt commonly found in limestone as impurities, but rarely found in dolomite.
  • Dolomite will not bubble when in contact with acid, while limestone will easily reacts with hydrochloric acid with the formation of CO2.
  • Unlike limestone dolomite is insoluble in water, resistant to various external damage, has a shiny surface.
  • Dolomitecheaperthan limestone.

Dolomite marble?

No, dolomite is different from marble.

Dolomite is a sedimentary rock similar to marble, but stronger.

Marble is a metamorphic rock also called recrystallized limestone. It contains large and coarse crystals (visible to the naked eye). Some marbles contain dolomite and are called dolomite marbles.

However, the construction industry believes that marble is composed of a variety of stones, including limestone, dolomite and serpentine. It is a natural architectural decorative stone for making dolomite countertops, window sills and indoor floors.

Is dolomite harmful?

Two common dolomite products are dolomite sand and dolomite flour, which are produced by the sand making process and the powder grinding process respectively. These products are so versatile that they can even be used as dietary supplements. So, are they safe?

1. Is dolomite sand safe?

The Philippines has covered Manila Bay beaches with dolomite sand to “whiten the beach.” This dolomite sand project has caused great controversy. So, can beautiful dolomite sand replace beach sand?

At first glance, a beach with dolomite sand may be a good idea, but it masks the problem of shoreline pollution and creates environmental problems.

Why is dolomite sand harmful? One reason is that dolomite sand can remain on the beach for several years, but it is chemically unstable and breaks easily. After several seasons of wear, it softens, dissolves and settles again, forming a crust.

However, beach sand is natural quartz sand with a hardness of 7 and is relatively well rounded. It is insoluble and stable, so it can be used for a long time.

Another reason is that dolomite sand is not safe for marine life. It is considered the most common water pollutant. The Philippines’ move will disrupt the habitat of marine animals and plants by burying them, reducing the oxygen content of seawater and blocking their access to sunlight.

2. Is dolomite harmful to humans?

Dolomite powder is harmful to human health. This is because it contains varying degrees of crystalline silica, which can cause lung damage or cancer if inhaled. In addition, dolomite powder may cause skin and eye irritation.

In addition, dolomite may contain deadly asbestos and heavy metals such as aluminum, arsenic, lead, mercury and nickel.

Therefore, you are better off not taking a dolomite powder supplement and opting for a safer calcium or magnesium supplement.

Conclusion

Although dolomite has certain risks, its economic value is higher. Whether it is crushed dolomite block, ground dolomite powder or dolomite sand, it can replace limestone for the production of building materials, cement, fertilizers, glass, ceramics, etc.

Author : Jordan Jordan is a blog writer with extensive knowledge of the industry. Most importantly, he sincerely hopes to help you in your projects.

Dolomite is a natural mineral belonging to the class of carbonates. It consists of oxygen, carbon, magnesium and calcium. It forms the sedimentary rock of the same name, which is gray, white or brown. Dolomite may contain manganese, lead, iron and barium as impurities. Its physical properties and chemical structure resemble limestone. But between them there are several transitional forms, differing mainly in the amount of magnesium contained.

Unlike limestone, the mineral is insoluble in water, resistant to various external damage and has a shiny surface. It is distinguished from other similar rocks by its high calcite content and the absence of other minerals in the form of inclusions. Dolomite crystals have a characteristic rhombus shape; sometimes there are curvatures on the faces, forming a saddle. To recognize the mineral in field conditions, hydrochloric acid is used, with which it practically does not react. If carbon dioxide is released, the rock is most likely calcite.

Now the mineral dolomite is not formed on the surface of the earth, but quite a lot of it is found in the most ancient layers. Deposits are found throughout the world. Mainly mass mining of dolomite is carried out in the USA, Canada, Mexico, Italy, Spain and Switzerland. In Russia, the breed is developed in the Caucasus, Southern Urals, Karelia and the Volga region. Mining of the mineral is also carried out in a number of regions of Belarus, Donbass, Kazakhstan and Armenia. Mining is carried out in open pits by blasting using various technologies.

For the production of dolomite ceramics, the Genaldon mineral is most often used, which is mined at the Genaldon deposit in North Ossetia. It is characterized by increased strength and frost resistance.

How is the mineral used?

Dolomite is widely used in construction, metallurgy, agriculture and some other industries. The positive qualities include the following:

  • strength;
  • plastic;
  • resistance to temperature extremes;
  • frost resistance;
  • low thermal conductivity;
  • environmental cleanliness.

Disadvantages include its high cost and small color palette (coloring is not possible).

Ease of processing and high strength make the use of dolomite accessible for construction and finishing works. The stone easily takes any shape. Slabs with good filtration properties are made from it, which makes it possible to improve the microclimate in finished rooms. Rock tiles are used for exterior cladding of buildings, while polished tiles are used for interior decoration of kitchens, bathrooms and public buildings. Slabs with a rough surface (bush hammered) are used for paving paths. Using special polishing techniques, it is possible to achieve a marble effect. The use of such stone is possible for decorating arches, fireplaces, and swimming pools.

The crushed mineral is used for the production of dry construction mixtures, giving them high-tech qualities. In addition, it is included in some types of sealants, mastics and paints and varnishes. The properties of dolomite allow it to be widely used in other areas:

  • in glass production;
  • for the production of roofing materials;
  • in the production of asphalt concrete;
  • it is part of fire extinguishing agents;
  • is a source of magnesium;
  • used in steel production;
  • in agriculture it is used to reduce acidity in the soil;
  • As a fertilizer, it enriches the soil with calcium and magnesium.

Making dishes

Dolomite dishes are lightweight due to the fact that the mineral has a porous structure. But at the same time fragility appears. Such dishes do not tolerate high temperatures well and become covered with a network of small cracks when hot. These are the main disadvantages of dolomite products. Since it is made from natural material, it is environmentally friendly and there is no harm from it. However, such ceramic cookware should be used with caution. It is only suitable for cold drinks or foods. It is recommended to wash it only by hand.

Healing and magical qualities of the mineral

The mineral is considered a masculine stone. Dolomite has properties that help develop fortitude, courage, strong-willed qualities, nobility and wisdom. Constantly wearing the stone makes its owner attractive in the eyes of the opposite sex. An amulet made from this mineral gives its owner spiritual comfort and attracts success and good luck.

Lithotherapists recommend wearing dolomite stone to those who suffer from insomnia, various phobias and unreasonable fear.

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