real gold is not afraid of fire refining does not refer to fire, because the chemical stability of gold is high, it is not easy to chemically react with other materials. Even if the fire is burned, it will not react with the air, and it will not change color, so it is still glittering. gold is a metal element, the chemical symbol is AU, and the atomic order is 79. The single quality (free form of free) of gold is commonly referred to as gold. It is a precious metal. It has been used for currency, value preservation and jewelry for many centuries. In nature, gold appears in the golden blocks or golden grains, underground ore veins and accumulation layers in the rock. Gold is also one of the currency metals. Gold is solid at room temperature, with high density, softness, light, and corrosion resistance. It is the best metal. It is second only to platinum. It is one of the best metals. Gold is a transitional metal, which can form three -valent and unit price positive ions after dissolving. Most of the chemicals and most chemicals will cause chemical reactions, but can be eroded by chlorine, fluorine, king water and cyanide. Gold can be dissolved by mercury to form mercury (but this is not a chemical reaction); nitric acid that can dissolve silver and alkaline metals cannot dissolve gold. It pure gold is flavorful because it is very resistant to erosion (the taste of other metals comes from metal ions). In addition, the density of gold is quite high, and the gold weight of one cubic meter is 19.320 tons. Compared with this, the density of the lead is 11.340 g/cm3, while the most density element is 锇, and its density is 22.661 g/cm3. High -purity gold single crystal can reflect infrared rays.
Under the standard atmospheric pressure, that is, at 101.325kPa, the gold melting point is 1064.4 degrees The pressure changes, and the melting point also changes.
Gold is a yellow precious metal. The chemical symbol is AU. The density, softness, and corrosion resistance are the highest among known metals. The purity of gold is represented by K (kara). 24K is 100 % pure gold, so it is the most expensive. Because the characteristics of gold are the softest and impact, most jewelry uses K gold to achieve the required hardness, durability and color.
Platinum (Platinum abbreviated PT, also known as platinum, pure platinum)
It is a high -density, ductility, toughness, gemstone, gray -white natural precious metal. Even at high temperature, it shows significant anti -corruption and fusion, so it is considered valuable metal. At the same time, the density of platinum is quite high. The same volume of platinum will be much better than gold and K gold.
In nature, platinum reserves are scarce than gold. The annual output of world platinum is far less than gold. Coupled with the high melting point of Platinum, pure melting platinum is more difficult than gold, and energy consumption is higher. Moreover, processing platinum needs to be higher than processing gold. Therefore, the price of platinum is therefore more expensive than gold. The symbol of platinum in the international color is PT, Plat or Platinum, and represented by pure thousand points, such as PT950, indicating that the purity is 95%. The International Platinum Association (PGI) explicitly order PT850 or more can be called platinum. The specifications of platinum jewelry are marked with PT950, PT900, and PT850.
PT950: Platinum is 95%, 钯 5%binary alloy.
PT900: Platinum is 90%, 钯 10%of binary alloys.
PT850: Platinum is 85%, 钯 and copper 15%three yuan alloys.
k gold (K GOLD)
k gold refers to the alloy with gold and other metals. Due to the characteristics of gold, it is easy to fall off due to insufficient strength inlaid. Therefore, metals such as silver, copper, and zinc are usually added to gold to increase the strength and toughness of gold to facilitate the inlay of high -grade jewelry. The metal made in this way is called "K gold".
The white K gold is complete and correct is white K gold. White K gold jewelry usually uses 18k or 750 to represent the goldenness contained in the emotion.
K number
k number is distinguished by gold content (purity), 24K is pure gold, and the rest are K gold. The relationship between K numbers and gold content is: AU WT%= K/24X100%
75%gold content is called 18K 750, 58.5%content is called 14K 585, and 41%content is called 10K, of which, of which 10K, of which, are 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K is called 10K, of which 10K is called 10K. The extensibility of 18K gold and high hardness, which is higher than the alloy stability of other K numbers, so it is most often used in jewelry production.
C gold that is rich in color is the most commonly used material in jewelry. It is the most expression of precious metals. The unique status in the jewelry industry is lasting
Gold is a precious metal with yellow luster and one of the most precious and rare metals in the metal kingdom. The symbol of the chemical element of gold is AU, which is the abbreviation of Latin "AURUM", which means "the dawn of the pre -dawn". Buried in the "flesh of God". The ancient Indians regarded gold as "the sun's sweaty beads", and the Bible. Revelation recorded the streets of Jerusalem in Saint City ... Gold was given mythical power in all times. It is tempting people and torture people. American economist Peter Bernstein said in the book "Gold's Magic" inspection: "No one has never made it clear, whether we have gold or gold to own us.
:
The earliest gold of gold is determined by the special nature of gold. Gold can exist in a single form in nature, while other metals often exist in the form of compounds. Pure gold can reflect on reflection The gorgeous yellow color changes the color after the other metals. For example, the gold and copper alloy are dark red, and the silver alloy is light yellow or gray -white. When the gold is melted, the steam is green; Its gold powder is usually brown; if gold is made into a thin golden box, it is green to see gold in the light. When the Taoist daughter -in -law, the golden scream, is green for nine yuan. The atomic order of gold in the Menjiev cycle table is 79, which has good chemical stability.
Gold has good physical characteristics. Its melting point is high, reaching 1 064.43 degrees Celsius, and real gold is not afraid of fire. "It means that gold under the flame is not easy to melt. The density is 19.31 grams cubic centimeters, and a pure golden ball with a diameter of only 46 mm is 1,000 grams. Gold has excellent building toughness and ductility, and people can cast any shape as they want. 1 gram of pure gold can be extended to more than 3000 meters. If it is made into gold foil, the area can reach 9 square meters. Gold's antioxidant capacity is very strong, and the physical stability of single gold gold is very good. Gold is easily grinded into powder, which is why gold elements are scattered in nature. Pure gold jewelry is also easily worn and reduced.
The before people use gold as currency, due to its durability, density, and glittering characteristics, gold has naturally become a symbol of wealth. If you want to put the current gold in the world into a space, a large tanker is needed, and their total weight is about 160,000 tons.
It because gold has these special natural attributes, people give it social attributes, that is, currency circulation function. Gold has become an old material wealth as an important means for human storage wealth. Currency is not gold and silver, but gold and silver are naturally currency. In the north of the low -sex cities in the 20th century, real gold is the place where the world currency still has a place in the international reserves of various countries. It is a special product with commodity attributes and golden cell attributes.
Gold (GOLD) is a single form of chemical element gold (chemical element symbol AU). It is a soft, golden, corrosive precious metal. Gold is one of the rare, precious and extremely valued metals. Internationally, gold is generally based on ounces. In ancient China, "two" was used as a gold unit, and it was a very important metal. It is not only a special currency for reserves and investment, but also an important material for the jewelry, electronics, modern communications, aerospace and air industry and other departments. The chemical symbols of gold are AU, and the English code in finance is XAU or GOLD. The name of the AU comes from a story of Aurora, a goddess of dawn in Roman mythology, means shining dawn. On August 5, 2020, the price of gold exceeded $ 2033/ounce, setting a new historical record. The steam emitted when the gold is melted is green; its gold powder is usually brown during the smelting process; if it is cast into a thin piece, it can also transmit green light. 2, ductility: is extremely strong. 1 ounce of gold can be pulled into 50 miles long, and its ductility makes it easy to cast and is a good choice for making jewelry. Gold is the strongest in the metal. 3, forgedness: INO. It can cause extremely thin and easy to roll up. 1 ounce of gold can be hammered to 4 million -foot thick and 100 square feet. The ancients hammed it into thin slices to decorate the temples and the palace. These can explain the strong flexibility and forgedness of gold. The color of gold is golden yellow, metal luster, difficult to break down. The hardness is 2-3, the pure gold is 19.3, and the melting point is 1064.4 ° C; it has good ductility and can be pressed into thin foil. It has extremely high heat transfer and conductivity. The resistance of pure gold is 2.4P. Pure gold has good anti -chemical corrosion and is the best electroplating material.
Gold melting point: 1064.43 degrees Celsius
real gold is not afraid of fire refining does not refer to fire, because the chemical stability of gold is high, it is not easy to chemically react with other materials. Even if the fire is burned, it will not react with the air, and it will not change color, so it is still glittering.
gold is a metal element, the chemical symbol is AU, and the atomic order is 79.
The single quality (free form of free) of gold is commonly referred to as gold. It is a precious metal. It has been used for currency, value preservation and jewelry for many centuries. In nature, gold appears in the golden blocks or golden grains, underground ore veins and accumulation layers in the rock. Gold is also one of the currency metals. Gold is solid at room temperature, with high density, softness, light, and corrosion resistance. It is the best metal. It is second only to platinum. It is one of the best metals.
Gold is a transitional metal, which can form three -valent and unit price positive ions after dissolving. Most of the chemicals and most chemicals will cause chemical reactions, but can be eroded by chlorine, fluorine, king water and cyanide. Gold can be dissolved by mercury to form mercury (but this is not a chemical reaction); nitric acid that can dissolve silver and alkaline metals cannot dissolve gold.
It pure gold is flavorful because it is very resistant to erosion (the taste of other metals comes from metal ions). In addition, the density of gold is quite high, and the gold weight of one cubic meter is 19.320 tons. Compared with this, the density of the lead is 11.340 g/cm3, while the most density element is 锇, and its density is 22.661 g/cm3. High -purity gold single crystal can reflect infrared rays.
Under the standard atmospheric pressure, that is, at 101.325kPa, the gold melting point is 1064.4 degrees
The pressure changes, and the melting point also changes.
Gold is a yellow precious metal. The chemical symbol is AU. The density, softness, and corrosion resistance are the highest among known metals. The purity of gold is represented by K (kara). 24K is 100 % pure gold, so it is the most expensive. Because the characteristics of gold are the softest and impact, most jewelry uses K gold to achieve the required hardness, durability and color.
Platinum (Platinum abbreviated PT, also known as platinum, pure platinum)
It is a high -density, ductility, toughness, gemstone, gray -white natural precious metal. Even at high temperature, it shows significant anti -corruption and fusion, so it is considered valuable metal. At the same time, the density of platinum is quite high. The same volume of platinum will be much better than gold and K gold.
In nature, platinum reserves are scarce than gold. The annual output of world platinum is far less than gold. Coupled with the high melting point of Platinum, pure melting platinum is more difficult than gold, and energy consumption is higher. Moreover, processing platinum needs to be higher than processing gold. Therefore, the price of platinum is therefore more expensive than gold. The symbol of platinum in the international color is PT, Plat or Platinum, and represented by pure thousand points, such as PT950, indicating that the purity is 95%. The International Platinum Association (PGI) explicitly order PT850 or more can be called platinum. The specifications of platinum jewelry are marked with PT950, PT900, and PT850.
PT950: Platinum is 95%, 钯 5%binary alloy.
PT900: Platinum is 90%, 钯 10%of binary alloys.
PT850: Platinum is 85%, 钯 and copper 15%three yuan alloys.
k gold (K GOLD)
k gold refers to the alloy with gold and other metals. Due to the characteristics of gold, it is easy to fall off due to insufficient strength inlaid. Therefore, metals such as silver, copper, and zinc are usually added to gold to increase the strength and toughness of gold to facilitate the inlay of high -grade jewelry. The metal made in this way is called "K gold".
The white K gold is complete and correct is white K gold. White K gold jewelry usually uses 18k or 750 to represent the goldenness contained in the emotion.
K number
k number is distinguished by gold content (purity), 24K is pure gold, and the rest are K gold. The relationship between K numbers and gold content is: AU WT%= K/24X100%
75%gold content is called 18K 750, 58.5%content is called 14K 585, and 41%content is called 10K, of which, of which 10K, of which, are 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K, of which, are called 10K, of which 10K is called 10K, of which 10K is called 10K. The extensibility of 18K gold and high hardness, which is higher than the alloy stability of other K numbers, so it is most often used in jewelry production.
C gold that is rich in color is the most commonly used material in jewelry. It is the most expression of precious metals. The unique status in the jewelry industry is lasting
Gold is a precious metal with yellow luster and one of the most precious and rare metals in the metal kingdom. The symbol of the chemical element of gold is AU, which is the abbreviation of Latin "AURUM", which means "the dawn of the pre -dawn". Buried in the "flesh of God". The ancient Indians regarded gold as "the sun's sweaty beads", and the Bible. Revelation recorded the streets of Jerusalem in Saint City ... Gold was given mythical power in all times. It is tempting people and torture people. American economist Peter Bernstein said in the book "Gold's Magic" inspection: "No one has never made it clear, whether we have gold or gold to own us.
:
The earliest gold of gold is determined by the special nature of gold. Gold can exist in a single form in nature, while other metals often exist in the form of compounds. Pure gold can reflect on reflection The gorgeous yellow color changes the color after the other metals. For example, the gold and copper alloy are dark red, and the silver alloy is light yellow or gray -white. When the gold is melted, the steam is green; Its gold powder is usually brown; if gold is made into a thin golden box, it is green to see gold in the light. When the Taoist daughter -in -law, the golden scream, is green for nine yuan. The atomic order of gold in the Menjiev cycle table is 79, which has good chemical stability.
Gold has good physical characteristics. Its melting point is high, reaching 1 064.43 degrees Celsius, and real gold is not afraid of fire. "It means that gold under the flame is not easy to melt. The density is 19.31 grams cubic centimeters, and a pure golden ball with a diameter of only 46 mm is 1,000 grams. Gold has excellent building toughness and ductility, and people can cast any shape as they want. 1 gram of pure gold can be extended to more than 3000 meters. If it is made into gold foil, the area can reach 9 square meters. Gold's antioxidant capacity is very strong, and the physical stability of single gold gold is very good. Gold is easily grinded into powder, which is why gold elements are scattered in nature. Pure gold jewelry is also easily worn and reduced.
The before people use gold as currency, due to its durability, density, and glittering characteristics, gold has naturally become a symbol of wealth. If you want to put the current gold in the world into a space, a large tanker is needed, and their total weight is about 160,000 tons.
It because gold has these special natural attributes, people give it social attributes, that is, currency circulation function. Gold has become an old material wealth as an important means for human storage wealth. Currency is not gold and silver, but gold and silver are naturally currency. In the north of the low -sex cities in the 20th century, real gold is the place where the world currency still has a place in the international reserves of various countries. It is a special product with commodity attributes and golden cell attributes.
Gold (GOLD) is a single form of chemical element gold (chemical element symbol AU). It is a soft, golden, corrosive precious metal. Gold is one of the rare, precious and extremely valued metals. Internationally, gold is generally based on ounces. In ancient China, "two" was used as a gold unit, and it was a very important metal. It is not only a special currency for reserves and investment, but also an important material for the jewelry, electronics, modern communications, aerospace and air industry and other departments.
The chemical symbols of gold are AU, and the English code in finance is XAU or GOLD. The name of the AU comes from a story of Aurora, a goddess of dawn in Roman mythology, means shining dawn.
On August 5, 2020, the price of gold exceeded $ 2033/ounce, setting a new historical record.
The steam emitted when the gold is melted is green; its gold powder is usually brown during the smelting process; if it is cast into a thin piece, it can also transmit green light.
2, ductility:
is extremely strong. 1 ounce of gold can be pulled into 50 miles long, and its ductility makes it easy to cast and is a good choice for making jewelry. Gold is the strongest in the metal.
3, forgedness:
INO. It can cause extremely thin and easy to roll up. 1 ounce of gold can be hammered to 4 million -foot thick and 100 square feet. The ancients hammed it into thin slices to decorate the temples and the palace. These can explain the strong flexibility and forgedness of gold.
The color of gold is golden yellow, metal luster, difficult to break down. The hardness is 2-3, the pure gold is 19.3, and the melting point is 1064.4 ° C; it has good ductility and can be pressed into thin foil. It has extremely high heat transfer and conductivity. The resistance of pure gold is 2.4P. Pure gold has good anti -chemical corrosion and is the best electroplating material.