1, look at the color: the higher the purity of gold jewelry, the darker the color. Check the gold edge discoloration, if the yellow gold gradually disappears, it is gold-plated;
2, look at the mark: there are official steel seals on the gold jewelry, generally 999, 990, 10K, 18K, 22K, 24K, etc., less than 10K gold content is low;
3, listen to the sound: the gold jewelry fell on the ground, the sound is pure gold, the sound is dull and elastic is false;
4, hardness test: gold texture is soft, bending will appear fish scale texture, is a unique feature of gold.
Marriage to buy gold how to distinguish between true and false
1. Look at the color
The color of gold is distinct from that of other metals. The higher the purity of gold jewelry, the darker the color, the more golden. It is also possible to check the discoloration of the gold edges or worn areas, and if the yellow gold gradually disappears into other colors, it is gold-plated.
2. Look at the mark
Gold jewelry will have an official steel seal, and the steel seal on a gold ring is usually the inner ring. Generally, there are 999, 990, 10K, 18K, 22K, 24K, etc., and the gold content is low below 10K. But some fake gold can also be printed with symbols to confuse the public, such as the English letter "GK", meaning "gold plated".
3. Listen to the sound
The gold jewelry falls on the ground, making a crisp "patter" sound, and there is no elasticity for pure gold; The sound is dull and makes a "dangdang" sound, and it will jump on the ground is fake gold.
4. Test the hardness
The texture of gold is soft, after bending a few times, the bending part will appear fishscale texture, which is a unique feature of gold, but do not force too hard, otherwise it will break.
5. Burn jewelry
Burn the gold jewelry with fire, taking care not to burn the jewelry out of shape. Wait until it cools to observe the color change, if it is pure gold, the surface is still golden after burning; If gold is not pure, it will turn black.
6. Put in water
Pure gold is so dense that it sinks directly into water. Imitation gold products are less dense and lighter, and will float. In addition, real gold will not rust and will not lose its luster. If discoloration is found, it's probably just gold plating or fake gold.
7. Chemical testing
Shake the gold jewelry in the alcohol solution, then soak a piece of filter paper into the alcohol solution, at this time the filter paper will turn gray purple. Add 4 drops of bromo-A reagent to the filter paper. If the filter paper turns back white, then the product is real gold.
8. Scratch test
Lightly scratch gold with unglazed ceramic, if the scratch is black, it is not gold; If the scratch is still gold, it's real gold.