I bought a gold necklace for my mother. She said it's hot recently, a little hot. Some people say it is fake gold. What do you think of this problem?

Maybe it's hot weather. Everything feels hot. If you're still worried, I'll teach you how to identify.

Burn a little gold. If the surface of the necklace turns black, it is not pure gold, because if there is no change, it is gold.

You'd better try it alone. As a result, you just need to know.

thank you