Every piece of jewelry has a carved mark: platinum is: PT900, PT950, PT990. As long as there is no GP, every word is true.
The interior material is alloy and copper, and the first ornament plated with 18K gold is 18KGP. 18KGP is the symbol of alloy imitation jewelry. ? It consists of two symbols, 18K is the symbol, and k stands for gold content, that is, gold content. The relationship between k number and gold content is: Au wt% = K/24× 100%, and the national standard GB 1 1887-89 stipulates that the gold content per k is 4.655. ?
GP is the abbreviation of English goldplain, commonly known as forging gold in business. This logo means that the product is mainly made of phosphorus and copper in general metals after high-temperature forging, and then plated with a layer of gold, which can be divided into two types according to the thickness of the gold layer. The thickness of gold-plated layer is about 1mi (mic is the unit of gold-plated layer thickness stipulated by international standards).
1. Necklace is a chain jewelry made of gold, silver and jewelry. It is one of the ornaments of human body and the earliest jewelry. Some necklaces not only have decorative functions, but also have special display functions, such as prayer beads of Buddhist disciples and Catholic cross chains.
Necklace is one of the ornaments of human body and the earliest jewelry. Some necklaces not only have decorative functions, but also have special display functions, such as Catholic cross chains and Buddhist prayer beads.
3. Since ancient times, in order to beautify the human body and the environment, people have made necklaces with different styles, characteristics and styles to meet the aesthetic needs of people with different skin colors, nationalities and aesthetics. This paper introduces the style of necklace from two aspects: material and style. As far as materials are concerned, there are several kinds of necklaces in the jewelry market, such as gold, silver and jewelry.
4. Among them, there are three kinds of gold necklaces: red gold, 18K and 14K. The fineness of silver includes 92.5% silver, silver plating and gold plating. Jewelry used as necklaces includes high-grade materials such as diamonds, rubies, sapphires, emeralds, emeralds and natural pearls, as well as middle and low-grade materials such as agate, coral jade, ivory and cultured pearls. Jewelry necklaces have stronger decorative effect and richer color changes than gold and silver necklaces, which are especially popular among young people.
References:
Baidu encyclopedia: necklace