1, different content.
The content of pure gold is different from that of thousands of pure gold. The gold content in pure gold jewelry is generally not less than 99%, while thousands of pure gold means that the gold content is as high as 99.9%. Comparatively speaking, thousands of pure gold has better color and higher price.
2. Different colors
In addition, the colors of the two are also different, because the contents of pure gold and thousands of pure gold are different, thousands of pure gold is almost close to pure gold, and its surface is mainly yellow, with bright color, and the flashing light can be seen under strong light, while the pure gold is slightly worse.
3, the process is different
In the manufacturing process of pure gold, welding technology is generally used, and gold will also have certain loss, but in contrast, it is easier to process, while thousands of pure gold is made by solderless welding technology, with less loss, greatly improved color, hardness and toughness.
The imprint of gold jewelry includes the manufacturer's code, material and purity, such as: X Gold 990, XAu990, X Pure Gold, etc. Among them, the letter X is the manufacturer's code. When jewelry is made of precious metals with different materials or purities, the materials and purities should be indicated separately. When the jewelry can't be printed because it is too fine or too small, it should be accompanied by a logo containing the contents of the imprint.
Because the density of gold is obviously higher than that of common metals such as copper, silver, lead and zinc, it is about twice as heavy as that of silver and copper with the same volume. If the object is gold, it feels heavy, which is the "golden pendant" of people's department, and vice versa.
Thousands of pure gold with high color have no rhyme and elasticity when thrown on the ground, while thousands of pure gold with low color have a slightly brighter sound quality, while copper products have a loud sound when thrown on the ground. Therefore, according to the sound of knocking objects, it can help us distinguish common metals from gold.