First, the gold content is different. The gold content of 999 is 99.9%. So four nines and three nines have higher gold content.

Second, the strength is different, four nine golds and three nine golds are softer! 999 gold is very hard Compared with four nine gold boxes, it can be used as ornaments, and 24 nine gold boxes. Because of its soft texture, it is more suitable for personal collection.

Third, the prices of these kinds of gold are different, because 49 gold has a high content. Four nine-point gold medals and three nine-point Huang Jingui gold medals.

The national standard of gold purity refers to the lowest point of purity. However, the purity of pure gold and most raw materials of pure gold in foreign markets exceeded these lowest points (purity of pure gold is 995, purity of pure gold is 999.5). Pure gold 999 is called pure gold 999, and its content is higher than or equal to 999.0, which is the largest value in jewelry color naming, and its seal is "pure gold 999" or "Au999". Tone. Distinguish the hue of gold according to its hue under strong light. Among the color naming of jewelry, pure gold 999 is the most valuable.