What is the world s gold used for?

Scarcity is expensive, so our impression of ** has always been expensive, because **is very special, there is no way to synthesize, it is very stable in any environment, so **has become a precious item in the world, **since ancient times are a symbol of wealth, according to Chinese historical records, ** first began to be used more than 2000 years ago, and in the currency ** for the currency, because ** easy to divide and easy to carry, so with ** in exchange for a large number of materials, and later people in order to be more convenient, only silver ticket banknotes appeared.

First, used in a variety of aerospace science and technology medical fields since its discovery, in the world are much loved, in addition to as decorations, it has an irreplaceable role in the field of science and technology and medical field, in a variety of manufacturing aerospace equipment measurement remote sensing can not do without the help of the world. Since ancient times in our country, there has always been acupuncture and moxibustion in traditional Chinese medicine, such as our more common acupuncture and moxibustion are silver needles, but their effects are not as good as gold needles, and some traditional Chinese medicines will not deteriorate for a long time if they are wrapped in gold leaf, and they can even improve their efficacy.

Second, the symbol of wealth even if the currency is highly developed today, we still need to be one of the national reserve assets, the role of the first in each country is very significant, is a symbol of wealth, the largest amount of each country, indicating that the country's currency is stable, the manufacture of paper money itself has no value, but the issuance is based on the need for **, in fact, many people like diamonds now, that diamonds are eternal, but the real value and preservation of value, is still **.

Third, the total number of ** in the world is limited What we see now is that it has existed on the earth for 4.5 billion years, as early as the early days of the earth, or there were meteorites bombed down, with the change of the state of the earth in the later period, most of them are integrated into the center of the earth, but there are many with the current technology of human beings can not be mined, so even if people know that there are 1400 tons on the earth, they can only look at each other from afar, and it is precisely because of this that the value of ** is so high.

Now the world's ** is used in gold bars, gold coins, gold nuggets, gold ornaments, gold trophies and certificates, and even gold teeth. There are probably only gold teeth that can be seen everywhere around us, and some people's teeth fall out naturally or fall out by external forces, so they need to fill their teeth, and some people choose gold teeth at this time.

Most of the world's ** are used by various countries for war preparedness savings, as the country's real estate, to cope with the future international situation!

Most of the world's ** have been stored by banks in various countries as **reserves**, and then most of the remaining ** are used to make **jewelry** for consumption, as well as some investment gold bars.

Some of them are used as special currency in the world and used to produce jewelry, ornaments, etc., and some are used to produce precision instruments.

Most of them are used as materials for military industry ** or circuit board production, and a small part is made into jewelry and jewelry. Because all electronic products need to be used, the properties are stable, high temperature resistant, and will not rust.

**Expensive reasons:1. ** is a rare metal, which is an elemental state of gold (AU), and its physical properties are relatively stable, such as high melting point, good electrical and thermal conductivity.

2. The most important point is that things are "rare" as expensive.

3. In addition, it is not easy to react with chemicals, except for aqua regia, it is difficult to dissolve in various acidic solutions, which is one of the reasons why it is used to make jewelry.

**Usage:1. The biggest use is jewelry.

2. There are also great uses in scientific and technological production.

3. It can also make dentures.

4. It can also be used in the aerospace industry.

5. **It can be used as a pledge for pawns.

**It's hard currency, it's a good hedging tool:

** is a kind of natural currency, before the absence of paper money, human beings have a historical period to use ** as "currency", even if now** out of the liquid currency market, but it is still a hard currency, often used in international reserves, belongs to one of the five major currencies of international settlement, is an excellent hedging tool.

For example, now that the global economy is in recession and the credit of the dollar is declining, major central banks can hoard **.

**It has industrial value and collection value, and the production is small so it is expensive.

** reserves are relatively scarce, so they are also extremely precious. At any time, ** can be used as a general equivalent to carry out the medium of exchange between items and items.

The physical and chemical properties of ** determine some of its unique industrial value, and are widely used in science and technology. For example, in the aerospace field, because of the high temperature resistance, can effectively reflect visible light and resist cosmic rays, and the ability to reflect infrared rays can be achieved, it has a wide range of applications in the aerospace industry.

It is a rare metal, and it is stable and easy to preserve, so it stands out among many rare metals and becomes the currency of human circulation, and it is also the most important way to invest at present, such as T+D, ETF, concept stocks, paper and so on.

**Kind:

1. Cooked gold: It is the first grade of raw gold after smelting and purification, with high purity and fine density. According to the level of fineness, cooked gold is divided into three types: pure gold, red gold, and colored gold.

2. Pure gold: the above fineness.

3. Pure gold - gold content is not less than 990.

4. Thousand pure gold - gold content greater than 999.

5. Red gold: similar to the meaning of pure gold, the standards of different locations are different, and the international market is the best of the best, and the fineness is up to it.

**Found in gold ore and naturally occurring.

Gold is crystalline at room temperature, equiaxed crystal system, cubic centric lattice, natural good crystal shape is very rare, often irregular granular, clumpy, flaked, reticulated, dendritic, fibrous and spongy aggregates. Pure gold is golden yellow and can change color when it contains impurities.

**Ore refers to ore containing gold elements or gold compounds, which can be beneficiated into gold concentrate or gold ore with high gold grade, and gold concentrate needs to be smelted and commissioned to become pure gold and gold products. Therefore, it cannot be artificial.

**It is a natural product that exists in a free state in nature and cannot be synthesized. According to the difference of its ** and the different content after refining, it is divided into raw gold and cooked gold.

Raw gold, also known as natural gold, barren gold, and raw gold, is the object of cooked gold, which is mined from mines or river bottom alluvium, and has not been melted and refined. Raw gold is divided into ore gold and sand gold.

Both. Mineral gold, also known as synthetic gold, produced in mines, gold mines, most of them are precipitated and accumulated by the hot springs gushing out of the ground through the cracks of the rock Xiaobu stone, often sandwiched in the cracks of the rock with quartz, the ore is mined, crushed, washed, and the large gold can be directly picked, and the small particles can be used for mercury.

Dissolve. Ore gold is large.

It is mostly associated with other metals, among which there are other metals such as silver, platinum, zinc, etc., which are called synthetic gold before other metals are proposed. Mineral gold is produced in different mines and contains different components of other metals, so the fineness varies from 50% to 90%.

Shajin is produced at the bottom of the river or in low-lying areas, so the stone and sand are mixed together and washed out. Sand gold originated from the mine, because the gold ore is exposed to the ground, after a long period of wind and rain, the rock weathered and cracked in the north, the gold will be separated from the vein along with the sediment and go down the water, naturally precipitated in the stone sand, at the bottom of the river or sand and gravel.

The underlying layer was deposited as a gold-bearing layer, resulting in the formation of sand gold. The characteristics of sand gold are: the size of the particles is different, the tall spike is like a broad bean, the small one is like fine sand, and the shape is different. The color varies according to the level of color, more than ninety percent is reddish yellow, eight becomes pale yellow, and seven becomes blue-yellow.

Cooked gold is the yellow gold of raw gold after smelting and purification, which generally has higher purity and finer density, and some can be directly used in industrial production. The most common ones are gold bars.

Blocks, ingots and a variety of ornaments, utensils, gold coins, as well as industrial gold wires, sheets, plates, etc. Due to different uses, the required fineness is different, or because there is no purification equipment, only melting is not purified, or the purity is not enough, forming a ** with different colors. It is customary for people to divide pure gold and red gold according to the level of fineness.

There are 3 types of color gold. According to the different gold content, it can be divided into clear color gold, mixed color gold, and K gold.

**After purification, the gold that achieves a fairly high purity is called pure gold, which generally refers to the above fineness**.

Some physical and chemical properties determine that it has its own industrial value.

For example, it is very stable, has good conductivity, soft texture and is easy to process, etc., so that it has a very wide range of uses in electronic products, and the modern electronics industry is inseparable.

In addition, high temperature resistance (real gold is not afraid of fire), can effectively reflect visible light and fight cosmic rays, the ability to reflect infrared rays is even more achieved, this use scenario is space, ** in the aerospace industry is also very widely used, a gold-plated layer for satellites or spacecraft, just like the atmosphere for us.

**Industrially used as follows:

Due to the excellent stability and good electrical and thermal conductivity of gold, it has become more and more widely used in the electronics industry. With the development of aerospace technology, more and more radio electronic components require a high degree of stability, such as coatings for high-grade vacuum tubes, power joints for special purposes, wire-drawn wires for special precision electronic instruments, high-frequency conductors for electroplating gold, and gold alloys for high-temperature welding.

Gold-coated integrated circuits used in computers, radios, televisions, tape recorders, etc. According to reports, in 1987, the world's electronics industry demanded 123t, accounting for the total demand. The application of gold in the chemical industry also has unique uses in the chemical industry, such as materials used in nuclear and chemical plants, alloy spinnerets used in man-made fiber factories, etc.

Gold-plated infrared devices and heat reflectors used in airplanes and other space vehicles, gold-coated heat shields or heat shields for jet engines and rocket engines, and heat shields coated with thin layers of gold for aircraft, automobiles, ships and other vehicles. Gold is used in traditional industries such as dental prosthesis, photography and pen making, and the application of gold still has a certain consumption. The application of gold in science and technology is constantly being developed.

**Can be used as an international reserve. This is determined by the monetary commodity attribute of **.

Due to the excellent characteristics of the currency, it has historically served as a monetary function, such as a measure of value, a means of circulation, a means of storage, a means of payment and a world currency. At present, many countries, including major Western countries, still occupy a very important position in their international reserves.

**With extremely high stability against corrosion, good electrical and thermal conductivity, the nucleus of gold has a large effective cross-section for capturing neutrons; Gold also has good manufacturability, and is easily processed into ultra-thin gold foil, micron gold wire and gold powder.

Rust:

Although ** itself is not corrosive, its chemical affinity with sulfide is very strong, and it is easy to adsorb hydrogen sulfide acid gas in the air, and the surface is dark such as orange, brown-red and other colors. **The production of products needs to go through many complex processes.

Taking gold bars and gold coins as examples, they all have to go through smelting, sheeting, cutting, grinding, annealing, frying, polishing, pressing, edge holding and other processes, and the working environment of these processes cannot be in a vacuum environment;

Each link may encounter dust and impurities in the air, which adhere to the blank of the product, and these impurities may become red spots after a period of storage without fading and pickling.

Summary. Hello dear, if the world is full of **, then ** is not worth much, and people do not have so much demand for **, then ** will depreciate.

Hello dear, if the world is full of **, then ** is not worth much, and people do not have so much demand for **, then ** will depreciate.

It wasn't until 1973 that Nixon decided to open up the link between the dollar and **. Nixon's reason for doing so was simple. The United States doesn't have that many ** to vouch for the money he prints.

However, at present, ** is still the fifth largest international settlement currency after the US dollar, the euro, the British pound and the Japanese yen, and it is also the main body of the official financial strategic reserves of many countries.

One of the most important reasons why it is used as money by humans is that it is an "inert" metal. An "inert" metal means that it barely reacts with other elements and has extremely stable chemical properties. Therefore, it does not rust, is not toxic and cannot be a usable energy source for the biosphere.

In other words, life doesn't need it. There are two kinds of gold in the universe**, one is the supernovae of massive stars**, and the other is the collision of neutron stars, both of which require atoms and electrons to synthesize gold at extremely high temperatures and pressures, and then it must fly out of the neutron star to exist as solid natural gold. So, is there really a lack of ** on earth?

No, it's not! According to scientists' estimates, there are about 60 trillion tons of ** resources on the earth, nearly 10,000 tons per capita. It can be seen that there is no shortage of ** on the earth.

If it is sprinkled on the ground, then it is no longer a scarce resource, but it is everywhere and cannot be precious at all.

The reason why it is expensive is because it can be stored for a long time and is not easy to react with other substances, and on the other hand, it is also closely related to its scarcity. Although scientists have detected a large number of ** in the interior of the earth, since we cannot mine the ** here, we will not encounter a large amount of mining** for the time being, resulting in a ****** situation.