First of all, we should know that the seal is a basis for issuing quality inspection certificates, but the seal of gold is different from the tools used by each company and has different natural effects. It is normal to hit with laser, and it is impossible to judge the authenticity of gold by steel seal. It is very important that only precious metal jewelry with metal imprint will be marked with its metal composition on its certificate. The metal composition on the certificate only indicates the metal composition on the metal surface, not the overall composition of nonmetal. Therefore, if precious metals, such as gold or silver, are plated on the surface of ordinary metals, quality inspection agencies cannot judge their true composition without in-depth detection of faults.
Nowadays, many jewelry marks are made by laser, some deep and some shallow. If it is deep, it is like a steel seal, if it is shallow, it is like writing lightly. Steel seal was punched by hand before there was a laser machine. Now there is a laser machine, which is convenient and fast. It must be a laser. In fact, both manual stamping and mechanical stamping of steel seal need manual operation, which has nothing to do with authenticity.
Why didn't the ancient gold bracelet have a steel seal?
Just because the manufacturer forgets to stamp the steel seal or misses the seal doesn't mean it's fake, because not all gold ornaments are stamped with the steel seal, but without the steel seal, they are unqualified. Steel seal also represents the identity of jewelry. According to the regulations, gold ornaments need to be stamped with steel seal to clearly indicate the purity and weight of gold. Some gold ornaments don't see the steel seal, maybe the steel seal is too small or hidden. Another situation is to buy fake goods, which need to be carefully identified when buying.