750 is 75% gold. It is usually represented by 18K. Twenty-five percent of other precious metals are added to it, which combines the characteristics of alloy and pure gold. Because the higher the purity of gold, the more difficult it is to make. If 25% other precious metals are added to gold, gold can be easily manufactured and widely used in jewelry design and industry.

18K gold is not pure gold jewelry, but it is a very suitable jewelry material with many advantages, which can be used by people with personality. For example, 18K gold, with high hardness, is the hardest of all jewelry at present, so you don't have to worry about deformation or scratch when wearing it.

750 is a metal with low cost and comfortable wearing. This metal is often used to make all kinds of jewelry. It has the advantages of strong toughness, high hardness, wear resistance and stable performance. 18K gold jewelry, after years of development, can be said to be one of the superior materials, and the price is relatively inexpensive, which can be said to be both close to the people and beautiful.

The softness of gold is relatively soft, so it is not suitable for setting gems. Because diamonds are easy to drop, pure gold jewelry is not suitable for setting gems. So 18K gold was developed, and 18K gold can also be called 18K gold.