18k is gold with a purity of 75%, which refers to the proportion of gold content in the materials used, and its content is 750 thousandths, that is, 75%. Generally, gold can be divided into 24k gold, 18k gold and so on. Depending on the purity, 24K gold is 100% gold, while 18k/24k is 0.75, and the used 18k is 75% pure. As for other ingredients except gold, you need to look at them to know the specific color. Generally, precious metals are used, so the color will change from white to rose.
Characteristics of 18k gold
18k gold not only has the noble value of gold, but also has a perfect composition ratio. It has the advantages of strong ductility, high hardness and changeable color. Used in jewelry design, it can give full play to complex and exquisite creative expression. Therefore, many merchants will choose 18k gold as the ring support for diamond rings.
18k gold is a new alloy, which consists of 75% gold and 25% other metals. In theory, 100% gold becomes 24k gold. There is no 100% gold in the world, and gold is softer than texture. Therefore, 24k gold is not suitable for diamond ring setting.