Which of the gold jewelry is a miscellaneous card?

Miscellaneous gold and emerging brands are best not to buy.
Especially when buying wedding jewelry, it is best to go to the big brand of stores to buy. First, the style is rich in style. Second, the security of gold is guaranteed. Miscellaneous gold may not be pure gold.
The emerging brands have just been released, and it needs to be watched. The brand is not guaranteed, so it is not recommended to buy it.
The expansion information:

The precautions for buying gold jewelry:
. The pivotal weight
The proportion of gold is 19.3g/cm3. Close to 19.3, the higher the pure gold. At 18.5, the gold contains 95%, and the gold contains 90%at 17.8. As long as the proportion is measured, the color of the jewelry can be seen, but it can generally be performed in the hands. If it is slightly heavy, it can be perceived, because the same weight of other metals, such as silver and copper, are different.
. Test soft and hard
The higher the color of the gold jewelry, the softer, and the more elasticity. It will not change color. Low -colored and fake are the opposite.
. Differential color
The saying goes, gold is "seven greens, eight yellow, nine purple, and ten red", which presents different colors because it contains different types of impurities and ingredients. The experts believe that the jewelry of 70 % of the gold is yellow, 80 % of the gold, and the golden gold, and the gold is 90 % of the yellow medium purple, and the gold is 10 % red.
. See the rhyme
The high -colored jewelry. Throwing it on the cement floor will have a dull sound, and there is sound without rhyme, no strength, commonly known as dead sound. On the contrary, the low -collision gold jewelry is thrown on the cement floor with rhymes and sharp sounds, and a slight jump.
. View the printing marker
The gold jewelry produced by regular production plants, all covered with gold content and production plant marks, such as 24K and 14K.
Reference information Source: Baidu Encyclopedia -Gold