Small waist gold necklace, bought in the store, is usually true. If you buy it online, you may get a fake. Because online things can't see the real thing, it's better to buy these platinum necklaces and gold necklaces, preferably in a physical store, and there is a little guarantee.

Mankalong uses verification code or QR code to identify authenticity or can look at the color of gold. The color of gold varies with the purity. Gold is generally small and heavy.