According to the national standard GB 1 1887-89, 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% = 4 1.660%

12k = 12 * 4. 166% = 49.992%

14k = 14 * 4. 166% = 58.324%

18k = 18 * 4. 166% = 74.998%

20k=20*4. 166%=83.320%

2 1k = 2 1 * 4. 166% = 87.486%

22k = 22 * 4. 166% = 9 1.652%

24k=24*4. 166%=99.984%

Remarks: Some gold ornaments are marked with words, and the provisions are as follows:

Pure gold-the gold content is not less than 990‰

Thousands of pure gold-the gold content is not less than 999‰

Gold is a simple form of chemical element gold (chemical element symbol Au), which is a soft, golden yellow and corrosion-resistant precious metal. Gold is a rarer, more precious and more valuable metal. Generally speaking, the gold in the world is in ounces. In ancient China, gold was measured in ounces, which was a very important metal. It is not only a special currency for reserve and investment, but also an important material for jewelry industry, electronics industry, modern communication and aerospace industry.

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

After the international gold price entered 20 15, it soared all the way. The gold price in new york market rose from $0/200 per ounce to $0/300 per ounce in less than a month. Statistics show that since 20 15, the price of gold futures in new york market has increased by 9.3%.

reference data

Classification of gold grades. Gold investment network [reference time 20 18- 1-5]