1 thought on “What is the gold content of gold and how to distinguish it”
Willie
How to identify the gold content of gold: (1) look at the mark: now the gold jewelry produced by Chinese manufacturers is purified and prepared according to international standards, and marked. K is used to indicate the gold content in metal products. The full gold is 24K, and the gold content is 99.6%; The gold content at 22K is 91.3%; The gold content at 20K is 83.3%; The gold content of 18K is 74.7%; The gold content of 14K is 58.5%; The gold content of 9K is 37.5%; The gold content of 8K is 33.3%; The gold content of 1K is 4.166%. According to the 24K or 18K words on the mark, you can know the quality of the jewelry, but if it is lower than 10k, you can't print the K-gold number (2) look at the color: generally, the higher the purity of gold jewelry, the darker the color. As people often say, "seven blue and eight yellow, nine purple and ten red", that is, if the gold ornament is cyan yellow, the gold content can reach 70%; It is yellow and contains 80-90% gold; If it is red yellow, the gold content can reach more than 95%. Of course, it is far from enough to distinguish the fineness and authenticity of gold jewelry only by color (3) weight: the specific gravity of gold is 19.3, which is higher than other metals. The weight of gold with the same volume is 1.8 times that of silver and 2.2 times that of copper. Therefore, the real gold should feel heavy in the hand, while the fake gold should feel light (4) listen to the sound: throw the gold ornament on the table or on the hard ground. The lower the gold content, the greater the elasticity, the higher the jump, and make a clear sound, and there are aftersounds; The higher the gold content, the smaller the elasticity, and the lower the jump. The sound is low, stuffy, heavy, and has no aftersound (5) hardness test: the higher the gold content of jewelry, the softer it is. It is easy to bend by hand. It has good toughness and is not easy to break. Scoring with hard things will leave clear scratches; The lower the gold content is, the harder it is. It needs a lot of force to bend, and it is easy to break. When it is scored with hard things, the scratch is not obvious (6) scientific detection: one is to identify by burning. Burn the jewelry in a smoke-free fire, and the color of pure gold will not change after burning; Those with dark or black color are fake gold or lack of fineness. The second is chemical method. Conduct spot test with sulfuric acid with concentration of 45% or 70%, and the gold remains unchanged; Silver turns black; The copper bubbles green. Because silver, copper and other metals are all soluble in acids, chemical reactions will occur extended data: gold is the elemental form of the chemical element "gold", which is a soft, golden yellow and corrosion-resistant precious metal. Gold in the world is generally measured in ounces. Gold is not only an important material for jewelry industry, electronics industry, modern communication, aerospace industry and other sectors, but also a special currency for reserve and investment. Gold is one of the rare and precious metals, which has a certain value stability. As a saving metal between countries, gold can effectively avoid the risks brought by inflation and share the investment risks among investors from different countries the relationship between the K number of K gold and the gold content x (%) in decorative articles is similar to a positive proportional function. The common gold content of 18 K gold is 75 (%). Please find the gold content of 24 K gold. 18K is 75% pure gold, and the rest is other materials such as silver or copper. 24K, that is, the theoretical gold content is 100% one of the characteristics of gold is its softness, so it is difficult to inlay all kinds of exquisite styles, especially when inlaid with pearls, gemstones, Jadeites and other treasures. Therefore, people add a small amount of silver, copper, zinc and other metals to gold to increase the strength and toughness of gold. The gold ornaments made in this way are also known as K-gold K-gold can be prepared into various colors according to needs. There are all kinds of popular K-gold jewelry in the world, including yellow and white. When 25% palladium or nickel is mixed into gold, it will become white. The main component of gold is gold, which is called white gold as far as technology is concerned, it is still impossible to extract pure gold materials with a purity of 100%. Therefore, the gold level standard k, which indicates the content of pure gold in gold products, generally refers to pure gold as 24 K gold, but it is theoretically 100% gold and does not exist in practice. Therefore, in the national standard, the non-standard method of "24K gold" shall not be used for the gold content of gold jewelry marked by merchants. Since pure gold is called 24K, that is, the theoretical gold content is 100%, 1K means that the gold products contain pure gold accounting for 1 / 24, about 4.16%. 18 K gold means that the gold content is 18 / 24, that is, 75% pure gold, and the rest is other materials such as silver or copper as the saying goes, "there is no shortage of gold". Generally, gold jewelry contains less than 1% of other metals. As for the fineness of the gold content of gold products, the national standard has very clear provisions, that is, every gold jewelry sold by merchants must be labeled with its gold content and weight. The weight of gold ornaments shall be in the national legal unit of measurement. The gold content should use "K gold" (excluding 24 K gold), "full gold" (containing no less than 99%), and "thousand full gold" (containing no less than 99.9%), and should not use "thousand full pure gold", "pure gold" and "24 K gold", "9999" and other non-standard standard methods 1. The difference between full gold, thousand gold and ten thousand gold the above three kinds of gold are collectively called pure gold, and the difference between the three materials is mainly in the gold content: full Gold: gold with a gold content of not less than 99.0% can be called full gold full Gold: gold with a gold content of not less than 99.9% can be called full gold full Gold: gold with a gold content of not less than 99.99% can be called full gold at present, the highest Chinese mark for the purity of gold products in the national standard (GB) is full gold, Therefore, customers who buy ten thousand gold should recognize the purity remarks on the certificate: 99.99% 2. How to identify gold jewelry when buying gold jewelry, you should first recognize the quality inspection marks of gold jewelry. Most of the gold jewelry sold in the market are equipped with inspection marks of quality inspection institutions, which clearly indicate the gold content and weight of the jewelry. All gold products (gold bars and jewelry) will have clear marks, also known as marks. The imprint includes manufacturer code, material and purity, such as X gold 990, xau990, X full gold, etc. Where, the letter X is the manufacturer code. When jewelry is made of precious metals with different materials or purity, the materials and purity should be expressed separately. When the jewelry cannot be printed due to reasons such as too fine or too small, it should be attached with a logo containing the imprint content.
How to identify the gold content of gold:
(1) look at the mark: now the gold jewelry produced by Chinese manufacturers is purified and prepared according to international standards, and marked. K is used to indicate the gold content in metal products. The full gold is 24K, and the gold content is 99.6%; The gold content at 22K is 91.3%; The gold content at 20K is 83.3%; The gold content of 18K is 74.7%; The gold content of 14K is 58.5%; The gold content of 9K is 37.5%; The gold content of 8K is 33.3%; The gold content of 1K is 4.166%. According to the 24K or 18K words on the mark, you can know the quality of the jewelry, but if it is lower than 10k, you can't print the K-gold number
(2) look at the color: generally, the higher the purity of gold jewelry, the darker the color. As people often say, "seven blue and eight yellow, nine purple and ten red", that is, if the gold ornament is cyan yellow, the gold content can reach 70%; It is yellow and contains 80-90% gold; If it is red yellow, the gold content can reach more than 95%. Of course, it is far from enough to distinguish the fineness and authenticity of gold jewelry only by color
(3) weight: the specific gravity of gold is 19.3, which is higher than other metals. The weight of gold with the same volume is 1.8 times that of silver and 2.2 times that of copper. Therefore, the real gold should feel heavy in the hand, while the fake gold should feel light
(4) listen to the sound: throw the gold ornament on the table or on the hard ground. The lower the gold content, the greater the elasticity, the higher the jump, and make a clear sound, and there are aftersounds; The higher the gold content, the smaller the elasticity, and the lower the jump. The sound is low, stuffy, heavy, and has no aftersound
(5) hardness test: the higher the gold content of jewelry, the softer it is. It is easy to bend by hand. It has good toughness and is not easy to break. Scoring with hard things will leave clear scratches; The lower the gold content is, the harder it is. It needs a lot of force to bend, and it is easy to break. When it is scored with hard things, the scratch is not obvious
(6) scientific detection: one is to identify by burning. Burn the jewelry in a smoke-free fire, and the color of pure gold will not change after burning; Those with dark or black color are fake gold or lack of fineness. The second is chemical method. Conduct spot test with sulfuric acid with concentration of 45% or 70%, and the gold remains unchanged; Silver turns black; The copper bubbles green. Because silver, copper and other metals are all soluble in acids, chemical reactions will occur
extended data:
gold is the elemental form of the chemical element "gold", which is a soft, golden yellow and corrosion-resistant precious metal. Gold in the world is generally measured in ounces. Gold is not only an important material for jewelry industry, electronics industry, modern communication, aerospace industry and other sectors, but also a special currency for reserve and investment. Gold is one of the rare and precious metals, which has a certain value stability. As a saving metal between countries, gold can effectively avoid the risks brought by inflation and share the investment risks among investors from different countries
the relationship between the K number of K gold and the gold content x (%) in decorative articles is similar to a positive proportional function. The common gold content of 18 K gold is 75 (%). Please find the gold content of 24 K gold. 18K is 75% pure gold, and the rest is other materials such as silver or copper. 24K, that is, the theoretical gold content is 100%
one of the characteristics of gold is its softness, so it is difficult to inlay all kinds of exquisite styles, especially when inlaid with pearls, gemstones, Jadeites and other treasures. Therefore, people add a small amount of silver, copper, zinc and other metals to gold to increase the strength and toughness of gold. The gold ornaments made in this way are also known as K-gold
K-gold can be prepared into various colors according to needs. There are all kinds of popular K-gold jewelry in the world, including yellow and white. When 25% palladium or nickel is mixed into gold, it will become white. The main component of gold is gold, which is called white gold
as far as technology is concerned, it is still impossible to extract pure gold materials with a purity of 100%. Therefore, the gold level standard k, which indicates the content of pure gold in gold products, generally refers to pure gold as 24 K gold, but it is theoretically 100% gold and does not exist in practice. Therefore, in the national standard, the non-standard method of "24K gold" shall not be used for the gold content of gold jewelry marked by merchants. Since pure gold is called 24K, that is, the theoretical gold content is 100%, 1K means that the gold products contain pure gold accounting for 1 / 24, about 4.16%. 18 K gold means that the gold content is 18 / 24, that is, 75% pure gold, and the rest is other materials such as silver or copper
as the saying goes, "there is no shortage of gold". Generally, gold jewelry contains less than 1% of other metals. As for the fineness of the gold content of gold products, the national standard has very clear provisions, that is, every gold jewelry sold by merchants must be labeled with its gold content and weight. The weight of gold ornaments shall be in the national legal unit of measurement. The gold content should use "K gold" (excluding 24 K gold), "full gold" (containing no less than 99%), and "thousand full gold" (containing no less than 99.9%), and should not use "thousand full pure gold", "pure gold" and "24 K gold", "9999" and other non-standard standard methods
1. The difference between full gold, thousand gold and ten thousand gold
the above three kinds of gold are collectively called pure gold, and the difference between the three materials is mainly in the gold content:
full Gold: gold with a gold content of not less than 99.0% can be called full gold
full Gold: gold with a gold content of not less than 99.9% can be called full gold
full Gold: gold with a gold content of not less than 99.99% can be called full gold
at present, the highest Chinese mark for the purity of gold products in the national standard (GB) is full gold, Therefore, customers who buy ten thousand gold should recognize the purity remarks on the certificate: 99.99%
2. How to identify gold jewelry
when buying gold jewelry, you should first recognize the quality inspection marks of gold jewelry. Most of the gold jewelry sold in the market are equipped with inspection marks of quality inspection institutions, which clearly indicate the gold content and weight of the jewelry. All gold products (gold bars and jewelry) will have clear marks, also known as marks. The imprint includes manufacturer code, material and purity, such as X gold 990, xau990, X full gold, etc. Where, the letter X is the manufacturer code. When jewelry is made of precious metals with different materials or purity, the materials and purity should be expressed separately. When the jewelry cannot be printed due to reasons such as too fine or too small, it should be attached with a logo containing the imprint content.