how to identify the authenticity of gold at home is as follows:
1. Fire burning method is one of the fastest methods to identify gold. Real gold will not change color after burning for a period of time. The fake gold contains more impurities, and the color will turn black and the luster will become dim after burning
2. The eye sees the normal state accompanying the beam, The color of gold has the saying of "seven green, eight yellow, nine purple Red", which means that pure gold containing real gold is red. If the gold is slightly purple, it is 90% gold content, and if the gold is yellow, it is 80% gold content.
3. Ear listening method: when the gold jewelry is thrown up and falls on the ground, the gold with high gold content will emit a "click" The sound is sound but no rhyme and no elasticity. The gold with low fineness contains more metal components. The sound after landing is deep and the echo is long and the elasticity is large
4. Magnets attract gold, and magnets attract gold. If the gold is sucked up by the magnet, it means that the gold is fake and cannot be sucked up normally. However, even if the gold is not sucked up, it is not necessarily real gold. It only means that there is no magnetic metal in the gold
5. Teeth bite gold. Use your own teeth to bite gold. Look at the tooth marks of gold. The deeper the tooth marks, the higher the purity of gold. But be aware that this method may damage the teeth
fire method is one of the fastest methods to identify gold. Real gold will not change color after burning for a period of time. The fake gold contains more impurities, and the color will turn black and the luster will become dim after burning
2. Hearing method
when the gold jewelry is thrown to the ground, the gold with high gold content will make a "snap" sound, with sound but no rhyme and no elasticity. The gold with low quality contains more other metal components, and the sound after landing is deep and the echo is long and elastic
3. Fold hardness
gold with high fineness can leave traces when it is scratched with pins or nails. More than 97% of the gold jewelry with good quality will appear wrinkles at the bend after two or three times of bending, which is called fish scale pattern
about 95% of the gold jewelry of good quality feels hard when it is bent, and the fish scale pattern is not obvious; About 90% of the gold jewelry of good quality is very hard when it is bent, and there is no fish scale pattern; Gold jewelry with more impurities can be broken after two or three times of bending; If it is made of raw gold, the bend is broken, and the section has obvious sand grain shape. When using this method, we should consider the width and thickness of jewelry. The thick and wide jewelry is harder, and the thin and narrow jewelry is softer
4. Use acid point
to grind the identified jewelry and comparative gold on the touchstone, and use glass rod point to test nitric acid on the gold channel. Because the chemical property of gold element is stable and does not react with acid, the color is unchanged
if it is not gold or pure gold, the gold channel will disappear or change. The change law is "three fast and three slow", that is, the low quality disappears quickly and the high quality disappears slowly; Mixed gold disappears quickly and clear gold disappears slowly; The big mixed gold disappears quickly, and the small mixed gold disappears slowly. Depending on the disappearance of the gold channel, the fineness of gold jewelry can be determined by comparison
how to identify the authenticity of gold at home is as follows:
1. Fire burning method is one of the fastest methods to identify gold. Real gold will not change color after burning for a period of time. The fake gold contains more impurities, and the color will turn black and the luster will become dim after burning
2. The eye sees the normal state accompanying the beam, The color of gold has the saying of "seven green, eight yellow, nine purple Red", which means that pure gold containing real gold is red. If the gold is slightly purple, it is 90% gold content, and if the gold is yellow, it is 80% gold content.
3. Ear listening method: when the gold jewelry is thrown up and falls on the ground, the gold with high gold content will emit a "click" The sound is sound but no rhyme and no elasticity. The gold with low fineness contains more metal components. The sound after landing is deep and the echo is long and the elasticity is large
4. Magnets attract gold, and magnets attract gold. If the gold is sucked up by the magnet, it means that the gold is fake and cannot be sucked up normally. However, even if the gold is not sucked up, it is not necessarily real gold. It only means that there is no magnetic metal in the gold
5. Teeth bite gold. Use your own teeth to bite gold. Look at the tooth marks of gold. The deeper the tooth marks, the higher the purity of gold. But be aware that this method may damage the teeth
1. Fire method
fire method is one of the fastest methods to identify gold. Real gold will not change color after burning for a period of time. The fake gold contains more impurities, and the color will turn black and the luster will become dim after burning
2. Hearing method
when the gold jewelry is thrown to the ground, the gold with high gold content will make a "snap" sound, with sound but no rhyme and no elasticity. The gold with low quality contains more other metal components, and the sound after landing is deep and the echo is long and elastic
3. Fold hardness
gold with high fineness can leave traces when it is scratched with pins or nails. More than 97% of the gold jewelry with good quality will appear wrinkles at the bend after two or three times of bending, which is called fish scale pattern
about 95% of the gold jewelry of good quality feels hard when it is bent, and the fish scale pattern is not obvious; About 90% of the gold jewelry of good quality is very hard when it is bent, and there is no fish scale pattern; Gold jewelry with more impurities can be broken after two or three times of bending; If it is made of raw gold, the bend is broken, and the section has obvious sand grain shape. When using this method, we should consider the width and thickness of jewelry. The thick and wide jewelry is harder, and the thin and narrow jewelry is softer
4. Use acid point
to grind the identified jewelry and comparative gold on the touchstone, and use glass rod point to test nitric acid on the gold channel. Because the chemical property of gold element is stable and does not react with acid, the color is unchanged
if it is not gold or pure gold, the gold channel will disappear or change. The change law is "three fast and three slow", that is, the low quality disappears quickly and the high quality disappears slowly; Mixed gold disappears quickly and clear gold disappears slowly; The big mixed gold disappears quickly, and the small mixed gold disappears slowly. Depending on the disappearance of the gold channel, the fineness of gold jewelry can be determined by comparison