Reference price: 3 13469.78 USD/kg.

Rhodium metal is usually used in lighting industry and mirror production; Used as catalyst and headlight reflector in automobile industry; Rhodium is also called jewelry, especially the scratch-resistant surface of "platinum". Rhodium can be used as a bright and hard coating for other metals, such as silverware or camera parts. Rhodium evaporates on the glass surface to form a thin layer of wax, which can make a very good reflector.

2. Palladium-an indispensable key material for aerospace and automobile manufacturing.

Reference price: 7 1, 406438+0/ kg.

Palladium is an indispensable key material in high-tech fields such as aerospace, aviation, navigation, weapons, nuclear energy and automobile manufacturing. For example, the most common use of palladium is catalytic converter, which can convert up to 90% of all harmful gases in automobile exhaust into less toxic substances. Especially in the international precious metals investment market.

3. Gold-Gold has outstanding anti-inflation and hedging functions.

Reference price: 6588 1.70/ kg

Gold is widely used, especially as a commodity collection and trading, which is not only used in jewelry, but also plays a very important role in aerospace, medicine, electronics and other industrial fields.

Iridium is the most corrosion-resistant metal.

Reference price: 52,887.98 yuan/kg

Iridium is usually used in metallurgy, medicine, automobile industry, electronics, aviation and other fields. Pen tip, bearing and balance of compass, surgical instruments, computer storage equipment, solid-state lasers, small thrust rocket engines and other products are all made of this metal. It can even be used to treat cancer, but this material is not suitable for jaw crusher.

5. Platinum-The most precious thing about platinum is that it will never fade and never change color.

Reference price: 3 1, 668.49/ kg

As a precious metal, platinum is used in jewelry and many industrial applications, including fuel cells, dentistry, electronic components, medical care, glass and petroleum. Laboratory equipment, anticancer drugs, hard disks, spark plugs, turbine engines, etc. Both involve platinum.

1, osmium-the densest metal in the world.

Reference price: 14, 109.58 USD/kg.

Ruthenium is one of the least platinum-based elements in the earth's crust and the last platinum-based element to be discovered. It was discovered more than 0/00 years after the discovery of platinum, which was 40 years later than other platinum elements.

Osmium metal is extremely fragile. If it is rammed with an iron mortar, it is easy to become powder, and the osmium powder is blue-black. Osmium is very stable in air, with a melting point of 2700 degrees Celsius. Insoluble in ordinary acids, it will not be corroded even in aqua regia. Osmium will boil at 130℃. Osmium vapor is highly toxic, which will strongly stimulate the human eye mucosa and cause blindness in severe cases.

2. Ruthenium-Ruthenium is the element with the least content in the middle crust of platinum system.

Reference price: 8680.70 USD/kg (data: August 7, 2020)

Ruthenium is usually used in electronic products. It is cheaper than rhodium and has very similar properties. It is usually used to produce electrical contacts, wires and electrodes. It is also used as catalyst in electrochemistry. Another new application is as the covering layer of extreme ultraviolet mask.

3. Rhenium-Rhenium is more difficult to obtain and more expensive than diamonds.

Reference price: 282 1.9 1 USD/kg.

Nickel-rhenium temperature alloy can be used to manufacture the combustion chamber of jet engine. These alloys, such as turbine blades and exhaust nozzles, contain up to 6% rhenium, which is the largest practical application of rhenium. Secondly, rhenium, as a catalyst in chemical industry, is more difficult to obtain than diamond, so it is expensive. Rhenium is very important in military strategy because it can be used in efficient jet engines and rocket engines.

4. Silver-silver has the highest conductivity and heat transfer among metals.

Reference price: 896.52 USD/kg

Pure silver is a beautiful silvery white metal with good ductility, and its conductivity and heat transfer are the highest among all metals. Silver is one of the metals found in ancient times. Silver exists in the form of simple substance in nature, but most of it exists in the form of compound. Silver has high ductility and can be rolled into a transparent foil with a thickness of only 0.00003 cm. Silver particles with a weight of 1 g can be drawn into filaments about two kilometers long.

Indium-Indium is the softest metal on the earth.

Reference price: 229.28 USD/kg

Indium is most commonly used in alloy, solder and soft metal high vacuum sealing in semiconductor industry. During World War II, it was used to coat the bearings of aircraft engines, but now it is used to make corrosion-resistant mirrors.