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: Neodymium iron boron
What Should We Know About Magnets?
Magnets are composed of iron, cobalt, nickel and other atoms, the internal structure of the atom is relatively special, it has a magnetic moment. Magnets