At present, the gold ornaments produced by China manufacturers are all purified and prepared according to international standards, and marked with K to indicate the gold content of metal products. 7K is almost 29% gold content.

Pure gold is 24K, with a gold content of 99.6%. The gold content of 22K is 91.3%; 20K contains 83.3% gold; 18K contains 74.7% gold; 14K contains 58.5% gold; The gold content of 9K is 37.5%. The gold content of 8K is 33.3%; The gold content of 1K is 4. 166%.