How Can You Tell If a Jewelry is Real With a Magnet?
A small magnet can identify the authenticity of silver jewelry Silver jewelry is very popular with young women, but, this dazzling silver jewelry is filled
Tag: AlNiCo
Types of Permanent Magnet Materials
At present, the common permanent magnetic materials are ferrite, NdFeB, samarium cobalt, aluminum nickel cobalt, rubber magnetism, and so on. Each of the above magnets