Gold is divided into several grades:

National standard GB11887-89 stipulates that the gold content per carat (abbreviation of English carat and German karat, often written as "k") is 4.166%.

8k=8*4.166%=33.328%

9k=9*4.166%=37.494%

10k=10*4.166%=41.660%

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12k=12*4.166%=49.992%

14k=14*4.166%=58.324%

18k=18*4.166%=74.998%

20k=20*4.166%=83.320%

21k=21*4.166%=87.486%

22k=22*4.166%=91.652%

24k=24*4.166%=99.984%

Note: Some gold jewelry is marked with text, and the regulations are:

Pure gold--the gold content is not less than 990‰< /p>

Thousand pure gold--the gold content is not less than 999‰

Gold (Gold) is the elemental form of the chemical element gold (chemical element symbol Au). It is a soft, golden yellow, Corrosion-resistant precious metal. Gold is one of the rarest, most precious and highly valued metals. Internationally, gold is generally measured in ounces. In ancient China, "liang" was used as the unit of gold. It is a very important metal. It is not only a special currency used for reserves and investment, but also an important material for the jewelry industry, electronics industry, modern communications, aerospace and aviation industries and other sectors.

The chemical symbol of gold is Au, and its financial English code is XAU or GOLD. The name Au comes from a story about Aurora, the goddess of dawn in Roman mythology, which means shining dawn.

International gold prices surged sharply after entering 2015. The price of gold in the New York market rose from US$1,200 per ounce to US$1,300 in less than a month; statistics show that the price of gold futures in the New York market has A cumulative increase of 9.3%.

Reference materials

Grade classification of gold. Jintou.com [cited time 2018-1-5]