999 pure gold means that the purity of gold reaches 99.9%. This kind of gold ornament is usually marked with the words 999 Gold, gold999 or g999. 999 pure gold can be recovered, but it needs to be purified again to obtain raw materials before the next round of production. However, there are usually losses in this process, so the price of 999 gold will not be higher than the original price when it is recycled, which is generally 95% of the price of 999 gold that day.