Jewelry made of gold mainly includes pure gold jewelry and K gold jewelry.

Pure gold jewelry, also called pure gold jewelry. There is no shortage of gold, and the purest gold can only reach 99.9999%. It is a "reagent gold" specially used as a standard reagent. The content of pure gold jewelry sold by jewelry stores is actually 99% and 99.99%. The former is called "Erjiu Gold" and the latter is called "49 Gold".

K gold refers to adding a certain proportion of silver, copper, zinc and other metals to gold to increase its strength and toughness. Karatgold's "k" is the abbreviation of "karat". The calculation method of K gold is to divide the pure gold with the highest content by 24K, and the gold content per K is 4. 166% (it was 4.15% in the early days of the People's Republic of China).

There are 24K, 22K, 20K, 18K, 14K, 12K, 9K, and the common ones are 18K (gold content 75%) and 14K (gold content 58.33%).

2.24k kK gold is often regarded as pure gold, but the actual gold content is 99.99% (actually 99.998%).

What is the platinum content of 3.24K platinum? 99.99%

4.pt999 refers to ornaments containing 99% platinum.

5.PT700 gold is 70% gold.

Extended data:

shopping guide

First of all, we must choose a brand enterprise with good reputation, and never choose a brand-free manufacturer for cheap. The price of gold is relatively transparent, so beware of those that are obviously lower than the market price;

Secondly, when buying gold products, remember to ask for invoices, which is the core of protecting consumers' rights and interests;

Third, if in doubt, you can find it in time. The gold jewelry testing institutions under the national technical supervision department are located in major cities, which makes it easier to detect the composition of gold jewelry.

Fourth, choose to invest in gold products such as gold bars and nuggets, and choose regular merchants who promise to buy back, and the quality can be guaranteed.

References:

Baidu encyclopedia-gold