Thousands of pure gold 18 is a standard name used to identify the purity of jewelry, precious stones and precious metals. This standard is to measure the content of pure gold jewelry, precious stones or precious metals through the proportion of purity. It means that the gold content is 75%, which is 18/24, which is equivalent to 999 purity of 7.5 million. This standard is called pure gold 18 because the density of pure gold is about 19.3g/cm3, which is about 7 times that of iron, and it has the golden appearance characteristics of millipedes, hence the name.

In addition to using 18 to measure the purity of jewelry, precious stones and precious metals, the purity can also be measured by the quality of gold particles or platinum particles engraved with 18. The advantage of this method is that it can measure the exact purity of jewelry, precious stones and precious metals, but the disadvantage is that it is expensive and is generally only used for the identification of high-end products.

Consumers should pay more attention when buying jewelry, precious stones and precious metals. The standard of using 18 for thousands of gold can often provide you with more authoritative appraisal results. Of course, this does not mean that the standard 18 is the only standard, because other standards, such as 14 or pure gold, are also widely used. Therefore, as consumers, we should think carefully before buying, not only to understand the purity standards, but also to seek the opinions of independent appraisal institutions.