Look at the color: The darker the color of the gold necklace, the higher the purity.
Look at the steel mark: gold, G999, 24K are all the marks of gold necklaces.
Test with magnets: Gold is not a magnetic metal and will not be attracted by magnets.
Look at the surface of the necklace: the surface of the gold necklace is bright and clean, feel smooth.
Bite gently with teeth: The texture of pure gold jewelry is soft, the teeth have a mark, and it is easy to bend.
Fire test: The surface of the pure gold necklace is still golden after fire.
1. Look at the color
The higher the purity of the gold jewelry, the darker the color. High purity gold necklace color golden, pure, soft, showing a deep red yellow gold, purity is generally more than 95%. But if the color is relatively light, or white, it must be the gold is not pure enough.
2. Look at the steel mark
Domestic gold jewelry is purified according to international standards, and each gold necklace will have steel marks. For example, "24K" indicates "sufficient", "sufficient gold" or "G999"; 18K gold, marked "18K". But now many bad merchants on the market will forge marks, so other methods are needed to assist identification.
3. Magnet test
Gold is not a magnetic metal. You can test it with a magnet. If your gold necklace is attracted to a magnet, it's proof that it's not real gold. If your gold necklace is not attracted by magnets, it may be real gold, but there are many non-magnetic metals, and this method can only rule out poor quality gold.
4. Look at the surface of the necklace
The surface of the gold necklace must be bright and clean, no obvious traces of processing, no obvious sharp corners, feel smooth. The surface should not have pores, impurities, etc.
5. Gently bite
Because the texture of pure gold jewelry is soft, the teeth have impressions, and it is easy to bend. So try biting the gold necklace with your teeth and see if any slight marks appear on it. Among them, the gold-plated jewelry feels lighter, the texture is harder, the teeth are not printed, and the color is easily faded after a long time. Some plated gold jewelry is not good, the color is not red or white, or flowers.
6. Test with fire
As the saying goes, "True gold is not afraid of fire", you can use fire gold jewelry, to cool it and observe its color changes. If it is pure gold, the surface will still be golden after burning. If it's black, it's not pure gold. However, pay attention to observe when burning, do not burn the necklace out of shape.