Why every ring when had better pay attention to the metal content?

Why need to metal content mark? Open hole simply don't see how much is the cheaper raw material proportion in the alloy. For example, platinum is gold and palladium or nickel alloy products. Therefore, your gold ring will never contain 100% gold content. But on the basis of the logo engraved with content, you can be sure you have enough gold ring. And this can guarantee high quality. Metal content mark is the legal provisions of the state? National laws and regulations, the purpose of the metal content of the logo is clear: to encourage fair trade and capture offenders on the bait. In 1987, made the law about metal content. But it is important to note: metal content mark is not a must. If you the gold ring no content of flag, this does not necessarily mean that its quality is low. If the quality of it, that means it has not yet been provided to authorities for validation. The appearance of the metal content mark, every country is not the same. In addition, a country, sometimes there are several versions in circulation. How is metal content logo printed? Some people think that the metal content of logo engraved on the gold ring will damage the ring at the same time, this idea is wrong. Today, we adopt the most advanced method to test the purity of precious metals. X-ray can prove the purity of alloy, and then with the help of laser engraved logo on metal content. More ancient method is impact. But this method is also very careful and precise, and does not cause any damage. On the gold ring I buy, where can I find the metal content of logo? My ring to use what material? You are always welcome to jewelry consultant advice, or in the common problems for more information.