How to identify the authenticity of gold jewelry?

Gold jewelry refers to jewelry made of gold as the main raw material. The golden chemical symbol is AU, the gravity is 17.4, and the hardness of Mobi is 2.5. Gold jewelry can be divided into two categories: pure gold and gold. The gold content of pure gold jewelry is more than 99 %, up to 99. 99 %. Therefore, it is also known as "Nine Nine Gold" / full gold "and" red gold ". Gold jewelry is a jewelry made of other metals (such as silver and copper) to gold materials, also known as" opening gold to open gold "," Sucible Gold ". Because the amount of other golden careers is more and less, different K kills of gold jewelry. In gold jewelry, pure gold jewelry texture is softer, and the teeth are bite. The color is golden, pure, soft, with heavy feel, and a heavy feeling. K -golden jewelry is hard, the teeth bite the useless, and the color is yellow with white, and the white number is reduced, the white is gradually increased, and the yellow is shallow. The feel of gold jewelry is not as heavy as pure gold jewelry. In addition, both pure gold and K have seals. The seals on gold jewelry are useful "gold" and are also represented by "one". K number, in addition, the jewelry also marks the seal of the origin of different manufacturers. Gold -plated jewelry is plated on the surface of other metal jewelry on the surface of the plating method. The color is similar to the real gold jewelry. . But the gold jewelry feels lighter, the texture is hard, the teeth are bitten by the yuan, and it is easy to fade with a long time. It refers to 24 or 22K gold foil on other gold eagle surfaces, such as the pressure of the golden box, which is very low. It is difficult to distinguish between true and false. But carefully observing the depression, angle, behind the back, etc., you can find that there is a bumpy foil and the phenomenon of talling and peeling. The broken business is yellow in the outer yellow. In addition, the feel of the gold jewelry is also lighter, the texture is harder than the pure gold jewelry, the teeth are bitten by the yuan, and it is not easy to bend. , Or copper jewelry, generally do not have a printing sign similar to gold jewelry. Or the printing is different from gold jewelry. , Crooked oblique, consumers should identify whether there is a printing on the jewelry, whether the printing meets the above provisions, whether the printing is clear, etc. to determine the authenticity of gold jewelry

The amount of jewelry is divided into 24K (more than 99%of gold content), 22K (91.7%), 18K (75%gold content), 14K (58.33%), 12K (50%gold content). When buying gold jewelry, you can identify from the following aspects.
The color dislike: As the saying goes, gold is "Qiqing, Eight Yellow, Jiu Zi, Ten Chi". The experts believe that the jewelry of 70 % of the gold is yellow, and 80 % of the gold is yellow. The pure gold is soft, and it is generally not used to make embedded jewelry. Therefore, all inlaid gold jewelry claims to be 24K and there must be fraud.
This: The proportion of gold is 19.3 grams/cubic centimeter, and the proportion is more related to the proportion. When the proportion is close to 19.3, the higher the pure gold. At 18.5, the gold contains 95%, and the gold contains 90%at 17.8, and so on. As long as the proportion is measured, the color of the jewelry can be seen. But most people can have a sense of precipitation.
Seeing the rhyme: The high -quality jewelry, thrown on the cement floor, there will be dull slap sounds, sound without rhyme, no strength, commonly known as
"dead sound". On the contrary, the low -collision gold jewelry is thrown on the cement floor with rhymes and sharp sounds, and a slight jump.
The test soft and hard: the higher the color of the gold jewelry, the softer, the more elastic, the real gold bite or the needle will have light marks. It will change color. Low -colored and fake are the opposite.