The color of Shifang's gold necklace is 18K. 18K gold refers to an alloy with gold content of 75% (i.e. 750‰) and the remaining 25% being other metals. Why is the gold necklace in the city square 18K in color? This is because 18K gold is widely used in jewelry industry and is considered as a high-quality metal material. 18K gold is not only high in pure gold content, but also relatively strong and durable, and is not easy to deform and scratch. In addition, the color of 18K gold is yellow, giving people a warm and noble feeling.

Extended content: In addition to 18K fineness, gold has other common fineness, such as 24K, 22K and 14K. 24K gold is pure gold with a gold content of 99.9% (999.9‰). Pure gold has the highest precious metal value, but it is also soft and not suitable for small ornaments. The gold content of 22K gold is 9 1.7% (that is, 9 17‰), which is slightly lower than that of 18K gold, but it is still a high-purity gold material. The gold content of 14K gold is 58.3% (583‰), which is relatively low, but it is also durable. Therefore, choosing 18K gold necklace can achieve high gold quality and durability, while maintaining the luster and color of gold.