Collect and understand the classification and meaning of several gold ornaments, which is of great help to newcomers when choosing gold ornaments. Let's take a look together. 1, pure gold jewelry Pure gold jewelry is golden yellow, bright but soft, with good ductility. According to international regulations, all jewelry made of precious metals must be stamped on the inside of the jewelry, and the gold content and factory manufacturer should be indicated in the stamping. All gold with 99% gold content is called pure gold, and those with 99.9% gold content are called pure gold. Pure gold and pure gold belong to the category of pure gold. Collect and understand the classification and meaning of several gold ornaments, which is of great help to newcomers when choosing gold ornaments. Let's take a look together. 2.k gold jewelry K gold refers to the alloy in which gold and silver, copper, zinc and other metals are melted together. Because the English word for alloy is karat gold, it is called k gold for short. According to the gold content, K-gold series jewelry with different K numbers can be made, mainly including 22k, 18k, 14k, 10k, 8k and so on. Asians like high-k gold jewelry, such as 22k and 18k, while Europeans and Americans like 14k gold jewelry and 10k gold jewelry. 3. Gold-plated jewelry Gold-plated jewelry uses copper as a blank, and a layer of gold is plated on the surface of the jewelry, but the coating is generally very thin, about 3-5um. 4. Gold-plated jewelry Gold-plated jewelry is also called gold filling in the United States. It is a layer of gold foil on copper or silver. The thickness of gold foil is between 10-50um. Because the thickness of gold foil is thicker than that of gold plating, its appearance is similar to that of gold jewelry. This kind of gold-plated jewelry is marked kf in America. 5. Gold-plated jewelry Gold-plated jewelry is an ancient gold-plated process. It is made by evenly coating a layer of mixed thick paste of gold and mercury on jewelry with low value such as copper and silver, and then baking at low temperature. When mercury is evaporated by heat, gold adheres to the surface of copper and then flattens and polishes. 6, imitation gold jewelry imitation gold jewelry, also known as sub-gold jewelry, has a golden appearance and is made of metal elements such as copper, nickel and zinc. These jewels do not contain gold. According to the regulations, imitation gold jewelry is not allowed to be printed.