5 thoughts on “How to distinguish the purity of the gold necklace”
Rosemary
Normally, black spots should be dirt. Either fake goods, oxidation will basically not appear in the middle. Essence And gold jewelry will turn black after a long time. Essence dim. Essence Just get the jewelry store to clean it.
Gold (GOLD) is a single form of chemical element gold (chemical element symbol AU). It is a soft, golden, corrosive precious metal. Gold is one of the rare, precious and most valued metals. Internationally, gold is generally based on ounces, and ancient China was used as a gold unit. It was a very important metal. It is not only a special currency for reserves and investment, but also an important material for the jewelry, electronics, modern communications, aerospace and air industry and other departments. The chemical symbols of gold are AU, and the English code in finance is xauusd or GOLD. The name of the AU comes from a story of Aurora, a goddess of dawn in Roman mythology, means shining dawn. The international gold prices soared sharply after 2015. The price of gold in New York's market went up all the way from $ 1,200 per ounce, and it has risen to $ 1,300 in less than a month. Statistics show that the price of gold futures in New York market has increased by 9.3 this year. %. , Jin Taifu is a business that is based on the development, design, wholesale, and sales of jewelry. Merchants engaged in diamond network sales in Hong Kong and mainland China. His family is the O2O sales model combined with "physical stores and online stores" Essence Jin Taifu diamonds pursue simple and fashionable, creating jewelry with oriental culture and art, so that there are lovers in the world to have a unique Cupid diamond jewelry to witness their eternal love. 1. Whether the gold has a white highlight Maste the gold bar or gold jewelry with materials and observe the cut surface with a magnifying glass. Mixed in the middle. 2, measured the proportion. In the weight of a pure gold bars with an balance, and then put the gold bars into a measuring cup and flood the gold bar. Then put the detected gold bars in a measuring cup, whether the scale of the water rises or decreases. As long as it changes, it means that the gold bar is not pure gold. But if it is gold jewelry, this method is not applicable because there is air in gold jewelry. 3, real gold is not afraid of fire. This gold bars or gold jewelry burned for a while to observe its changes. Because the oxidation reaction occurs with oxygen in the air, the gold bars with insufficient purity will become gray; and the color of the pure gold will be red after the fire is baked. However, this method may be destroyed to jewelry. This method 1. The gloss of the gold jewelry can be applied to a layer of nail polish thinly on it. 2. If there are black silver films on the surface, 2 grams of salt, 7 grams of soda, 8 grams of bleaching powder, 60 ml of clear water, are made into a "golden device cleaning agent", put the gold jewelry in a bowl, and the golden jewelry is in a bowl. Pour in the cleaning agent. After 2 hours, remove the golden jewelry, rinse with water (preferably not hard water), buried in the wood chips to dry, and then wipe it with a soft cloth. 3, the ring inlaid with a cotton roll with a popsicle or match stick, wet the gemstone and its frame in the mixed fluid of the dew and glycerin, and then use the velvet cloth to brighten the ring. Do not scrape it with a kind of sharp objects. 4, salt and vinegar mixed synthetic cleaning agent, using it to wipe the pure gold jewelry, which can make a long time. 5, wipe or scrub with hot rice soup with hot rice, can also restore gloss. 6, scrubbing with ammonia water
It is recommended to go to the big store, and the regular chain store, because it is actually difficult to judge sufficient gold, thousands of gold. For the identification of the gold necklace, please refer to the following judgment. If there is no gold medal, you can determine the general color according to the following color (based on green gold. The so-called green gold contains only silver ingredients in gold); dark red yellow color is more than 95%, light red yellow 90-95% The pale yellow is 80-85%, the cyan is 65-70%, the color blue with white light is only 50-60%, and the slightly yellow and white are less than 50%. Generally, Qiqing, Eight Huang, and Jiu Chi can be used as a reference. (2) Type weight: The proportion of gold is 19.32, which is more important than metal such as silver, copper, lead, zinc, aluminum. The volume of gold is more than 40%heavier than the silver, 1.2 times heavier than copper, and 6.1 times heavier than aluminum. The gold jewelry should have a feeling of sinking in the hand, and the fake gold necklace feels light. This method is not suitable for gold jewelry inlaid. (3) Look at the hardness: pure gold is soft and low. It can draw light marks with nails. Teeth bite can leave the dental mark. The high gold necklace with high color is soft than the color. The bending method can also test the hardness, the pure gold is soft, it is easy to bend, the lower the purity, the less likely to bend. (4) Listening to the sound: The real gold with a color of more than 99%is thrown on the hard ground, and it will make a tap sound, there is no rhyme or elasticity. The fake or low golden sound is crispy but no dullness. Generally, the sound of "Dangdang" is emitted, and there are surplus sounds. (5) Burning with fire: Burn the jewelry to burn red (do not melt the jewelry) with fire (do not melt the jewelry), and observe the color change after cooling. The degree of darker is not pure gold. Generally, the lower the color, the stronger the color, and the darkens, which means that it is a fake gold gold necklace. (6) Seeing the mark: Domestic gold jewelry is all prepared according to international standards, and the killing records, such as "24K" indicate "foot red" or "foot gold"; 18K gold, "18K", indicate "18K" Words, those who are lower than LOK, can not play the K -printed number according to regulations. At present, illegal elements are commonly used to manufacture fake cards and imitation stamps in the society. They use rare gold, Asian gold, and even brass to impersonate real gold. Therefore, the identification of gold jewelry must be comprehensively determined according to the sample to determine the true and false and the quality of the real.
The method of identifying the authenticity of the gold necklace: 1. Seeing the color The different luster and color of the gold can be generally distinguished from pure gold, K gold, real gold, fake gold. That is, gold is better yellow (yellow -red), and the color is more than 95%; the positive yellow color is about 80%; the blue and yellow color is about 70%; the yellow color is slightly gray and the color is about 50%. Therefore, there is a formula for "seven green eight yellow, yellow nine five red, yellow leucorrhea ash pairs of gold". For jewelry from Jiu Tibet, there will be a saying that "copper turns green, silver turns black, and gold will never change color".
. The weight D gold is about double the weight of the same volume silver, lead, and tin. True gold has a feeling of falling on the hand, while copper or others only have a sense of heavyness without falling.
3. Listening to the sound When the golden jewelry with high color color is knocked down or threw it hard, the dull sound of "hits, clicks" is made, there is no charm or elasticity, no charm, no elasticity, no elasticity , K Kim has the rhyme, sound, elasticity, the greater the elasticity, the more the rhyme, the more old, the worse the color. The fake or low golden sound is crispy but no dullness. Generally, the sound of "Dangdang" is emitted, and there are surplus sounds.
4. Folding hardness The gold with high color shall be left with large head needles or nails. More than 97%of gold jewelry, after twisting two or three times, wrinkles appear at the bending, also called fish scales; about 95%of gold jewelry, it feels hard when bending, and the fish scales are not obvious; about 90%of the golden gold golden gold; The jewelry is very hard when the bending is bent, without fish scales; gold jewelry containing more impurities, bend twice or three times to break; if it is made for raw gold, the bend is broken. When using this method, the width and thickness of the jewelry should be considered. The thick and width should be hardened, and the thin and narrow ones are softer.
5. Use the test goldstone to identify the color The use of the gold -pairing card (the gold medal of the identified color) and the subject's first jewelry on the test gold stone to make the color of the gold jewelry. This method should be carried out under natural light and sunlight, and cannot be carried out under the direct sunlight and incandescent lamps. This in the past often used testing gold stones to determine the general content of gold. Testing gold stones are a mixed black mineral such as quartz and protein -containing quartz, and the gold is drawn on the test stone to see the general shape of the gold. Pure gold: shiny dark yellow, thick yellow; silver gold: light color change slightly green green; gold containing silver greater than 25%of gold: earth white; copper -containing gold: deeper color, red color tone; silver copper tone; Gold: yellow; gold containing zinc, same, nickel: white gold.
6. Use acid dot The golden trail of identified jewelry and cards on the test stone, and use a glass stick to test nitric acid on the golden road. Do not react with acid, so the color is unchanged. If it is not gold or non -pure gold, the Golden Road disappears or changes. The law of changes is "three fast, three slows", that is, the low color disappears quickly, and the high color disappears slowly; Depending on the disappearance of its golden road, compare cards can determine the color of gold jewelry.
7. Burning with fire This will be used to burn red (do not melt the jewelry) with fire (do not melt the jewelry), and observe the color change after cooling. If the color becomes darker or different degrees, it is not pure gold. Generally, the lower the color, the stronger the color, and the darkens are all, indicating that it is a fake gold jewelry. After burning red, it is quenched into the water, and the color remains unchanged. It really does not change color when it comes to fire.
The test, two golds with different purifications, one containing a small amount of impurities, and one is a full -scale gold. Essence The color of the gold necklace with a low purity becomes darker, the section is rough, and the location of the welding medicine is obviously dark; and the golden foot gold still shows the bright golden nature of the gold, the melting surface is smooth and clean, and even brighter than the original.
First of all, the most intuitive thing is to look at the characters in the jewelry. The content of the foot gold is not less than 99%, the thousand -foot content is not less than 99.9%, and the content of 10,000 enough gold is not less than 99,99%. Longfengxiang jewelry gold jewelry will have this type of logo, which is also identified by professional institutions, which is trustworthy. If you are not very convinced by the word printing, you can send it to the special quality inspection department for testing, and they will be more professional. Is when there are doubts about tags, and professional testing conditions are immature, I recommend a few simple and feasible tips for everyone. 1. Gold is "seven greens, eight yellows, nine purple ten red". It means that the blue gold contains 70%, the yellow contains 80%, the purple is 90%gold, and the red is almost 100%gold. Under the current conditions, there are almost no red gold, and there is a saying that "there is no redness in gold, no one is perfect. '" 2. Sound identification method. Let the jewelry fall into the hard place, the sound is dull, indicating that the color is good; the sound is crisp, which means that the color difference is different. 3. Bend identification method. Twitte -folding utensils, the real gold is soft, easy to bend and not easy to break. This is because gold is a very soft metal. On the pure gold, you can use nails to draw traces. Gold is easy to forge and is easy to extend. It can be crushed to transparent and transparent green foil with a thickness of 0.001 mm. 0.5 grams of gold can be pulled into a 160 -meter -long golden. 4. Demonstration of weight. Gold is the largest proportion of the material, and its proportion is 19:37. Bonard and red copper of the same weight are much larger than the same weight gold and red gold. You can know. 5. Fire burning identification method. As the saying goes, real gold is not afraid of fire, real gold jewelry can not change color with fire, but fake is not resistant to fire. After burning, it will turn dark brown, and it will lose light.
Normally, black spots should be dirt. Either fake goods, oxidation will basically not appear in the middle. Essence And gold jewelry will turn black after a long time. Essence dim. Essence Just get the jewelry store to clean it.
Gold (GOLD) is a single form of chemical element gold (chemical element symbol AU). It is a soft, golden, corrosive precious metal. Gold is one of the rare, precious and most valued metals. Internationally, gold is generally based on ounces, and ancient China was used as a gold unit. It was a very important metal. It is not only a special currency for reserves and investment, but also an important material for the jewelry, electronics, modern communications, aerospace and air industry and other departments.
The chemical symbols of gold are AU, and the English code in finance is xauusd or GOLD. The name of the AU comes from a story of Aurora, a goddess of dawn in Roman mythology, means shining dawn.
The international gold prices soared sharply after 2015. The price of gold in New York's market went up all the way from $ 1,200 per ounce, and it has risen to $ 1,300 in less than a month. Statistics show that the price of gold futures in New York market has increased by 9.3 this year. %.
, Jin Taifu is a business that is based on the development, design, wholesale, and sales of jewelry. Merchants engaged in diamond network sales in Hong Kong and mainland China. His family is the O2O sales model combined with "physical stores and online stores" Essence Jin Taifu diamonds pursue simple and fashionable, creating jewelry with oriental culture and art, so that there are lovers in the world to have a unique Cupid diamond jewelry to witness their eternal love.
1. Whether the gold has a white highlight
Maste the gold bar or gold jewelry with materials and observe the cut surface with a magnifying glass. Mixed in the middle.
2, measured the proportion.
In the weight of a pure gold bars with an balance, and then put the gold bars into a measuring cup and flood the gold bar. Then put the detected gold bars in a measuring cup, whether the scale of the water rises or decreases. As long as it changes, it means that the gold bar is not pure gold. But if it is gold jewelry, this method is not applicable because there is air in gold jewelry.
3, real gold is not afraid of fire.
This gold bars or gold jewelry burned for a while to observe its changes. Because the oxidation reaction occurs with oxygen in the air, the gold bars with insufficient purity will become gray; and the color of the pure gold will be red after the fire is baked. However, this method may be destroyed to jewelry.
This method
1. The gloss of the gold jewelry can be applied to a layer of nail polish thinly on it.
2. If there are black silver films on the surface, 2 grams of salt, 7 grams of soda, 8 grams of bleaching powder, 60 ml of clear water, are made into a "golden device cleaning agent", put the gold jewelry in a bowl, and the golden jewelry is in a bowl. Pour in the cleaning agent. After 2 hours, remove the golden jewelry, rinse with water (preferably not hard water), buried in the wood chips to dry, and then wipe it with a soft cloth.
3, the ring inlaid with a cotton roll with a popsicle or match stick, wet the gemstone and its frame in the mixed fluid of the dew and glycerin, and then use the velvet cloth to brighten the ring. Do not scrape it with a kind of sharp objects.
4, salt and vinegar mixed synthetic cleaning agent, using it to wipe the pure gold jewelry, which can make a long time.
5, wipe or scrub with hot rice soup with hot rice, can also restore gloss.
6, scrubbing with ammonia water
It is recommended to go to the big store, and the regular chain store, because it is actually difficult to judge sufficient gold, thousands of gold. For the identification of the gold necklace, please refer to the following judgment. If there is no gold medal, you can determine the general color according to the following color (based on green gold. The so-called green gold contains only silver ingredients in gold); dark red yellow color is more than 95%, light red yellow 90-95% The pale yellow is 80-85%, the cyan is 65-70%, the color blue with white light is only 50-60%, and the slightly yellow and white are less than 50%. Generally, Qiqing, Eight Huang, and Jiu Chi can be used as a reference.
(2) Type weight: The proportion of gold is 19.32, which is more important than metal such as silver, copper, lead, zinc, aluminum. The volume of gold is more than 40%heavier than the silver, 1.2 times heavier than copper, and 6.1 times heavier than aluminum. The gold jewelry should have a feeling of sinking in the hand, and the fake gold necklace feels light. This method is not suitable for gold jewelry inlaid.
(3) Look at the hardness: pure gold is soft and low. It can draw light marks with nails. Teeth bite can leave the dental mark. The high gold necklace with high color is soft than the color. The bending method can also test the hardness, the pure gold is soft, it is easy to bend, the lower the purity, the less likely to bend.
(4) Listening to the sound: The real gold with a color of more than 99%is thrown on the hard ground, and it will make a tap sound, there is no rhyme or elasticity. The fake or low golden sound is crispy but no dullness. Generally, the sound of "Dangdang" is emitted, and there are surplus sounds.
(5) Burning with fire: Burn the jewelry to burn red (do not melt the jewelry) with fire (do not melt the jewelry), and observe the color change after cooling. The degree of darker is not pure gold. Generally, the lower the color, the stronger the color, and the darkens, which means that it is a fake gold gold necklace.
(6) Seeing the mark: Domestic gold jewelry is all prepared according to international standards, and the killing records, such as "24K" indicate "foot red" or "foot gold"; 18K gold, "18K", indicate "18K" Words, those who are lower than LOK, can not play the K -printed number according to regulations. At present, illegal elements are commonly used to manufacture fake cards and imitation stamps in the society. They use rare gold, Asian gold, and even brass to impersonate real gold. Therefore, the identification of gold jewelry must be comprehensively determined according to the sample to determine the true and false and the quality of the real.
The method of identifying the authenticity of the gold necklace:
1. Seeing the color
The different luster and color of the gold can be generally distinguished from pure gold, K gold, real gold, fake gold. That is, gold is better yellow (yellow -red), and the color is more than 95%; the positive yellow color is about 80%; the blue and yellow color is about 70%; the yellow color is slightly gray and the color is about 50%. Therefore, there is a formula for "seven green eight yellow, yellow nine five red, yellow leucorrhea ash pairs of gold". For jewelry from Jiu Tibet, there will be a saying that "copper turns green, silver turns black, and gold will never change color".
. The weight
D gold is about double the weight of the same volume silver, lead, and tin. True gold has a feeling of falling on the hand, while copper or others only have a sense of heavyness without falling.
3. Listening to the sound
When the golden jewelry with high color color is knocked down or threw it hard, the dull sound of "hits, clicks" is made, there is no charm or elasticity, no charm, no elasticity, no elasticity , K Kim has the rhyme, sound, elasticity, the greater the elasticity, the more the rhyme, the more old, the worse the color. The fake or low golden sound is crispy but no dullness. Generally, the sound of "Dangdang" is emitted, and there are surplus sounds.
4. Folding hardness
The gold with high color shall be left with large head needles or nails. More than 97%of gold jewelry, after twisting two or three times, wrinkles appear at the bending, also called fish scales; about 95%of gold jewelry, it feels hard when bending, and the fish scales are not obvious; about 90%of the golden gold golden gold; The jewelry is very hard when the bending is bent, without fish scales; gold jewelry containing more impurities, bend twice or three times to break; if it is made for raw gold, the bend is broken. When using this method, the width and thickness of the jewelry should be considered. The thick and width should be hardened, and the thin and narrow ones are softer.
5. Use the test goldstone to identify the color
The use of the gold -pairing card (the gold medal of the identified color) and the subject's first jewelry on the test gold stone to make the color of the gold jewelry. This method should be carried out under natural light and sunlight, and cannot be carried out under the direct sunlight and incandescent lamps.
This in the past often used testing gold stones to determine the general content of gold. Testing gold stones are a mixed black mineral such as quartz and protein -containing quartz, and the gold is drawn on the test stone to see the general shape of the gold. Pure gold: shiny dark yellow, thick yellow; silver gold: light color change slightly green green; gold containing silver greater than 25%of gold: earth white; copper -containing gold: deeper color, red color tone; silver copper tone; Gold: yellow; gold containing zinc, same, nickel: white gold.
6. Use acid dot
The golden trail of identified jewelry and cards on the test stone, and use a glass stick to test nitric acid on the golden road. Do not react with acid, so the color is unchanged. If it is not gold or non -pure gold, the Golden Road disappears or changes. The law of changes is "three fast, three slows", that is, the low color disappears quickly, and the high color disappears slowly; Depending on the disappearance of its golden road, compare cards can determine the color of gold jewelry.
7. Burning with fire
This will be used to burn red (do not melt the jewelry) with fire (do not melt the jewelry), and observe the color change after cooling. If the color becomes darker or different degrees, it is not pure gold. Generally, the lower the color, the stronger the color, and the darkens are all, indicating that it is a fake gold jewelry. After burning red, it is quenched into the water, and the color remains unchanged. It really does not change color when it comes to fire.
The test, two golds with different purifications, one containing a small amount of impurities, and one is a full -scale gold. Essence The color of the gold necklace with a low purity becomes darker, the section is rough, and the location of the welding medicine is obviously dark; and the golden foot gold still shows the bright golden nature of the gold, the melting surface is smooth and clean, and even brighter than the original.
Bake with a spray rotation. If it is baked, the purity is high after baking. If it is not very bright, it means that the purity is relatively low.
First of all, the most intuitive thing is to look at the characters in the jewelry. The content of the foot gold is not less than 99%, the thousand -foot content is not less than 99.9%, and the content of 10,000 enough gold is not less than 99,99%. Longfengxiang jewelry gold jewelry will have this type of logo, which is also identified by professional institutions, which is trustworthy.
If you are not very convinced by the word printing, you can send it to the special quality inspection department for testing, and they will be more professional.
Is when there are doubts about tags, and professional testing conditions are immature, I recommend a few simple and feasible tips for everyone.
1. Gold is "seven greens, eight yellows, nine purple ten red". It means that the blue gold contains 70%, the yellow contains 80%, the purple is 90%gold, and the red is almost 100%gold. Under the current conditions, there are almost no red gold, and there is a saying that "there is no redness in gold, no one is perfect. '"
2. Sound identification method. Let the jewelry fall into the hard place, the sound is dull, indicating that the color is good; the sound is crisp, which means that the color difference is different.
3. Bend identification method. Twitte -folding utensils, the real gold is soft, easy to bend and not easy to break. This is because gold is a very soft metal. On the pure gold, you can use nails to draw traces. Gold is easy to forge and is easy to extend. It can be crushed to transparent and transparent green foil with a thickness of 0.001 mm. 0.5 grams of gold can be pulled into a 160 -meter -long golden.
4. Demonstration of weight. Gold is the largest proportion of the material, and its proportion is 19:37. Bonard and red copper of the same weight are much larger than the same weight gold and red gold. You can know.
5. Fire burning identification method. As the saying goes, real gold is not afraid of fire, real gold jewelry can not change color with fire, but fake is not resistant to fire. After burning, it will turn dark brown, and it will lose light.