5 thoughts on “How to distinguish the gold content of gold”
Lindsay
Differential gold requires some experience. Simply introduce some identification methods. But it is best to go to the gold shop!
(1) See color: the higher the purity of the gold jewelry, the deeper the color. 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 %, and the white light is only 50--60 % white light. 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 jewelry feels lightly. 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 tooth prints. High -colored gold jewelry is low and soft, with copper with copper, contains copper containing copper, contains copper containing copper The harder, the harder, 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: Real gold with a color of more than 99 % throwing it on the hard ground, 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: The jewelry will be burned red (do not melt the jewelry) with fire (do not melt the jewelry), and observe the color change after cooling. Dark or different degrees of darkness 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.
(6) Seeing the mark: Domestic gold jewelry is allicized and prepared according to international standards, and the killing records, such as "24K" indicate "foot red" or "foot gold"; The word "18K" is marked, and those who have a lower color are lower than LOK. 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 accurate identification of gold jewelry in accurate commonly used common methods.
(1) Testing gold stone method: Select the black test gold stone with delicate texture, use the standard tasting films with different gold content (on the gold medal) on the test gold stone, and then put the gold jewelry sample you want to identify in The scratches on the same goldstone, drip the concentrated nitric acid to remove the impurities, and find the traces left on the test gold stones compared with the traces of the tested slices. The accurate gold content of gold jewelry samples to be determined.
(2) Chemical method: also known as reagent test method. Gold is insoluble in separate nitric acid, sulfuric acid, and hydrochloric acid, and silver and copper ingredients can be dissolved with nitric acid. Take gold decorative sample. Putting nitric acid on a certain part, if gold will not change color, if it is silver products, it will generate silver oxide and turn black; For gold jewelry with a gold content of more than 95 %, test with nitric acid, the surface changes very small. I answers: Star 99991 -Enter the first level of the rivers and lakes 3-2 12:26 This comments on the answer: Thank you! The evaluation has been closed. R n100% (1) Not good 0% (0) related content • How do masters of various ways distinguish the authenticity and purity of gold? • How to distinguish the authenticity of gold? • Animal blood change gold is authentic? • How to identify the true and false of gold • How to identify the authenticity of gold? In more questions about what is "foot red 'and' foot gold '>> View the same theme question: Gold The other answers to a total of 1 How to distinguish the true Fake gold Gold jewelry refers to jewelry made of gold as the main raw material. The chemical symbol of gold is AU, with a gravity of 17.4 and Mo's hardness is 2.5. Gold jewelry can be divided into two categories: pure gold and K gold in terms of gold content. The gold content of pure gold jewelry is more than 99%, and it can reach up to 99.99%. K gold jewelry is a jewelry made of other metals (such as silver, copper metal) to its golden materials, also known as "opening gold" and "color gold". Due to the number of other metals, different K numbers of K gold jewelry are formed. The size and gold content of the K number are as follows: 24K, 99%or more; 22K, 91.7%; 21K, 87.5%; 18K, 75%; 14K, 58.5%; 12K, 50%; 10K, 41.66%; 9K, 37.5.5 % 8K, 33.34% 6K, 25%
In gold jewelry, pure gold jewelry texture is soft, teeth are bite, and it is easy to bend. a feeling of. K -gold's head jewelry texture is slightly harder, the teeth bite the use of mintes, the color is yellow in yellow, and the number of K is reduced, the white increases, and the yellow is shallow. The feel of K gold jewelry is not as heavy as pure gold jewelry. In addition, both pure gold and K gold jewelry have a printing sign. Printing on gold jewelry is used "gold" and "KG" English letters represent the texture. When indicating the gold content, the word "99" or "24K" indicates that it is pure gold jewelry. The K gold jewelry is marked with the corresponding K number, such as the K gold jewelry marked "18K". %. In addition, the jewelry also marks the printing of the origin of different manufacturers. Really gold jewelry, printing standards, completeness, and clear, is an important identification of judgment.
The types of jewelry that is easily confused with gold jewelry, some are gold -plated jewelry, some are gold jewelry, some are copper jewelry, and some are copper alloy jewelry. Let's explain all the brief explanations:
The gold -plated jewelry is plated on the surface of other metal jewelry on the surface of the electroplating method. Essence However, the gold -plated jewelry feels lightly, the texture is hard, the teeth are bitter, and it is easy to fade with a long time. Some gold -plated gold -plated jewelry, the color is either red or white, or flowers.
This gold jewelry refers to 24K or 22K gold foil on other metal surfaces, such as the KD number of K is too low, and its softness is poor. The appearance of the golden jewelry is similar to the real gold jewelry. The golden light is sparkling and it is not easy to fade, making it difficult to argue. However, if you carefully observe the depression, angle, back, etc. of the jewelry, you can find that the gold foil is uneven and there is a phenomenon of tilting edges. If there are broken joints on the jewelry, the cross section of the metal material can be seen from the outside. In addition, the feel of the gold jewelry is also lighter, the texture is harder than the pure gold jewelry, the teeth are bitter, and it is not easy to bend.
The copper jewelry color is yellow with red, fake, darker luster, soft texture, and light weight. Copper alloy jewelry (copper tin alloy), white color, hard and light quality, long -term coloring, will make the skin darker.
The gold -plated jewelry, gold jewelry, or copper jewelry, and Asian gold jewelry, generally do not have a gold jewelry -like printing. Or it is different from gold jewelry. If some jewelry is engraved with the English letters "GK", it means "gold plating". Or the signature traces are blurred and crooked. Consumers should identify whether there are printing, printing whether the printing is in compliance with the above provisions, and whether the printing is clear, etc. to determine the authenticity of gold jewelry. rnrn黄金首饰的鉴定方法很多，中国民间总结了一套简便方法，其口诀是：看色泽、掂重量、听音韵、折硬度、石上磨、对比牌、用酸点、 Fixed into color. The first four sentences depends on the eyes and the feeling; the latter four sentences need to be used by tools and reagents. . Seeing color Ben according to the different gloss and color of gold, you can generally distinguish pure gold, K gold, real gold, fake gold. That is, gold is better with red yellow, 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 greens, eight yellow, nine five red, and yellow leucorrhea ash. For jewelry from Jiu Tibet, there will be a saying that "copper turns green, silver turns black, and gold will never change color". . View density The density of gold is 19.32 grams / cubic centimeter, which is about double the same volume of silver, lead, and tin. Available formula: The mass (gram) of a certain gold jewelry (gram) is equal to density than the volume (cubic centimeter) of a certain gold jewelry (cubic centimeter). Seeking the density of the gold jewelry measured, the density is about 19.32 grams / cubic centimeter, it is pure gold or relatively pure gold, otherwise it is a non -pure gold or color difference gold (this method has no destructiveness to the jewelry). . Folding hardness Gold has the characteristics of ductility and small hardness, which can be pressed into thin pieces of 12.7 microns. When the color is high, marks can be left with large head needles or nails. More than 97 % of gold jewelry, after twisting two or three times, wrinkles appear at the bend, also called fish scales; about 95 % gold jewelry, feel hard when bending, the fish scales are not obvious; 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. . Listening to the rhyme, watching elasticity When the high -quality gold jewelry is hit or throwing it hard, it emits a dull sound of "hits, clicks", and has no rhyme and elasticity. K gold has sound rhyme, sound, elasticity, the greater the elasticity, the more the rhyme, the more old, the worse the color. 5. Use the test goldstone to identify the color The use of the gold -pairing card (the gold medal identified in 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. . Use acid dot The golden roads that have been identified and paired on the testing stone, respectively, and test nitric acid on the golden road with glass sticks. , 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.
(1) See color: the higher the purity of the gold jewelry, the deeper the color. 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 %, and the white light is only 50--60 % white light. 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 jewelry feels lightly. 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 tooth marks. High -colored gold jewelry is low in 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: Throwing the real gold with more than 99 % to throw it on the hard ground, 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 the 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 are all, indicating that it is a fake gold jewelry. (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.
Pay content for time limit to check for freenAnswer Hello, 1. Look at the color, the higher the purity of the gold jewelry, the deeper the color. 2. The weight, the gold jewelry should be sinking in the hand, and the fake gold jewelry feels lightly. 3. Listening to the sound, the real gold with a color of more than 99%is thrown on the hard ground, it will make a click, there is no rhyme or elasticity. The fake or low golden sound is crispy but no dullness. Generally, the sound is made, and there is a loud sound. 4. Looking at the mark, the domestic gold jewelry is allicized and prepared according to international standards, and the killing records, such as "24K" indicate "foot red" or "foot gold", 18K gold standard "18K".
. Observation. Gold is the seven green eight yellow, yellow nine purple ten red. It means that the golden yellow gold content is 70 %, the yellow gold contains 80 %, the purple yellow gold contains 90 %, and the red yellow contains almost 100 %. (2) Look at the proportion. Gold is the largest proportion of the material, and its proportion is 19.37, and the same weight brass; the size of the red copper volume is much larger than the gold of the same weight. Those who have experience, look at the color, weigh the weight, and know one or two. (3) It can be compared with hardness, burning with fire, and using a acid solubility method to identify gold. The reddish hardness is the smallest. You can bite the marks with your teeth. You can use a large needle to draw the pattern. The real gold is not afraid of the fire. Flash, the other metals will be oxidized and discolored as soon as it is burned. Real gold is not soluble in a single acid (such as, hydrochloric acid, sulfuric acid), other metals are not as good as gold reference materials: Life Encyclopedia
Preliminary books are easier to master. There are four main methods: . Differential color. Looking at the color of the golden appearance, commonly known as "seven greens, eight yellow nine five red", pure gold light and glitter, mixed gold there is a numbness. . Looking at whether it is commensurate with the size of the size, the shape is large and lighter may be adulterated. three, compromise. The gold jewelry is folded with the hand, the softer is high -definition gold, and the low and mixed are not soft. Small piece of gold can be bent with both hands, the clear gold is soft, with wrinkles at the folding; the low -colored steel is hard; four, knocking. Two of the same gold jewelry collided, the high -colored person's voice, low golden sound, mixed gold, his voice became fooled.
Differential gold requires some experience. Simply introduce some identification methods. But it is best to go to the gold shop!
(1) See color: the higher the purity of the gold jewelry, the deeper the color. 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 %, and the white light is only 50--60 % white light. 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 jewelry feels lightly. 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 tooth prints. High -colored gold jewelry is low and soft, with copper with copper, contains copper containing copper, contains copper containing copper The harder, the harder, 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: Real gold with a color of more than 99 % throwing it on the hard ground, 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: The jewelry will be burned red (do not melt the jewelry) with fire (do not melt the jewelry), and observe the color change after cooling. Dark or different degrees of darkness 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.
(6) Seeing the mark: Domestic gold jewelry is allicized and prepared according to international standards, and the killing records, such as "24K" indicate "foot red" or "foot gold"; The word "18K" is marked, and those who have a lower color are lower than LOK. 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 accurate identification of gold jewelry in accurate commonly used common methods.
(1) Testing gold stone method: Select the black test gold stone with delicate texture, use the standard tasting films with different gold content (on the gold medal) on the test gold stone, and then put the gold jewelry sample you want to identify in The scratches on the same goldstone, drip the concentrated nitric acid to remove the impurities, and find the traces left on the test gold stones compared with the traces of the tested slices. The accurate gold content of gold jewelry samples to be determined.
(2) Chemical method: also known as reagent test method. Gold is insoluble in separate nitric acid, sulfuric acid, and hydrochloric acid, and silver and copper ingredients can be dissolved with nitric acid. Take gold decorative sample. Putting nitric acid on a certain part, if gold will not change color, if it is silver products, it will generate silver oxide and turn black; For gold jewelry with a gold content of more than 95 %, test with nitric acid, the surface changes very small.
I answers: Star 99991 -Enter the first level of the rivers and lakes 3-2 12:26
This comments on the answer: Thank you! The evaluation has been closed. R n100% (1) Not good
0% (0)
related content
• How do masters of various ways distinguish the authenticity and purity of gold?
• How to distinguish the authenticity of gold?
• Animal blood change gold is authentic?
• How to identify the true and false of gold
• How to identify the authenticity of gold?
In more questions about what is "foot red 'and' foot gold '>>
View the same theme question: Gold
The other answers to a total of 1
How to distinguish the true Fake gold
Gold jewelry refers to jewelry made of gold as the main raw material. The chemical symbol of gold is AU, with a gravity of 17.4 and Mo's hardness is 2.5. Gold jewelry can be divided into two categories: pure gold and K gold in terms of gold content. The gold content of pure gold jewelry is more than 99%, and it can reach up to 99.99%. K gold jewelry is a jewelry made of other metals (such as silver, copper metal) to its golden materials, also known as "opening gold" and "color gold". Due to the number of other metals, different K numbers of K gold jewelry are formed. The size and gold content of the K number are as follows:
24K, 99%or more; 22K, 91.7%; 21K, 87.5%; 18K, 75%; 14K, 58.5%; 12K, 50%; 10K, 41.66%; 9K, 37.5.5 % 8K, 33.34% 6K, 25%
In gold jewelry, pure gold jewelry texture is soft, teeth are bite, and it is easy to bend. a feeling of. K -gold's head jewelry texture is slightly harder, the teeth bite the use of mintes, the color is yellow in yellow, and the number of K is reduced, the white increases, and the yellow is shallow. The feel of K gold jewelry is not as heavy as pure gold jewelry. In addition, both pure gold and K gold jewelry have a printing sign. Printing on gold jewelry is used "gold" and "KG" English letters represent the texture. When indicating the gold content, the word "99" or "24K" indicates that it is pure gold jewelry. The K gold jewelry is marked with the corresponding K number, such as the K gold jewelry marked "18K". %. In addition, the jewelry also marks the printing of the origin of different manufacturers. Really gold jewelry, printing standards, completeness, and clear, is an important identification of judgment.
The types of jewelry that is easily confused with gold jewelry, some are gold -plated jewelry, some are gold jewelry, some are copper jewelry, and some are copper alloy jewelry. Let's explain all the brief explanations:
The gold -plated jewelry is plated on the surface of other metal jewelry on the surface of the electroplating method. Essence However, the gold -plated jewelry feels lightly, the texture is hard, the teeth are bitter, and it is easy to fade with a long time. Some gold -plated gold -plated jewelry, the color is either red or white, or flowers.
This gold jewelry refers to 24K or 22K gold foil on other metal surfaces, such as the KD number of K is too low, and its softness is poor. The appearance of the golden jewelry is similar to the real gold jewelry. The golden light is sparkling and it is not easy to fade, making it difficult to argue. However, if you carefully observe the depression, angle, back, etc. of the jewelry, you can find that the gold foil is uneven and there is a phenomenon of tilting edges. If there are broken joints on the jewelry, the cross section of the metal material can be seen from the outside. In addition, the feel of the gold jewelry is also lighter, the texture is harder than the pure gold jewelry, the teeth are bitter, and it is not easy to bend.
The copper jewelry color is yellow with red, fake, darker luster, soft texture, and light weight. Copper alloy jewelry (copper tin alloy), white color, hard and light quality, long -term coloring, will make the skin darker.
The gold -plated jewelry, gold jewelry, or copper jewelry, and Asian gold jewelry, generally do not have a gold jewelry -like printing. Or it is different from gold jewelry. If some jewelry is engraved with the English letters "GK", it means "gold plating". Or the signature traces are blurred and crooked. Consumers should identify whether there are printing, printing whether the printing is in compliance with the above provisions, and whether the printing is clear, etc. to determine the authenticity of gold jewelry. rnrn黄金首饰的鉴定方法很多，中国民间总结了一套简便方法，其口诀是：看色泽、掂重量、听音韵、折硬度、石上磨、对比牌、用酸点、 Fixed into color. The first four sentences depends on the eyes and the feeling; the latter four sentences need to be used by tools and reagents.
. Seeing color
Ben according to the different gloss and color of gold, you can generally distinguish pure gold, K gold, real gold, fake gold. That is, gold is better with red yellow, 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 greens, eight yellow, nine five red, and yellow leucorrhea ash. For jewelry from Jiu Tibet, there will be a saying that "copper turns green, silver turns black, and gold will never change color".
. View density
The density of gold is 19.32 grams / cubic centimeter, which is about double the same volume of silver, lead, and tin. Available formula: The mass (gram) of a certain gold jewelry (gram) is equal to density than the volume (cubic centimeter) of a certain gold jewelry (cubic centimeter). Seeking the density of the gold jewelry measured, the density is about 19.32 grams / cubic centimeter, it is pure gold or relatively pure gold, otherwise it is a non -pure gold or color difference gold (this method has no destructiveness to the jewelry).
. Folding hardness
Gold has the characteristics of ductility and small hardness, which can be pressed into thin pieces of 12.7 microns. When the color is high, marks can be left with large head needles or nails. More than 97 % of gold jewelry, after twisting two or three times, wrinkles appear at the bend, also called fish scales; about 95 % gold jewelry, feel hard when bending, the fish scales are not obvious; 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.
. Listening to the rhyme, watching elasticity
When the high -quality gold jewelry is hit or throwing it hard, it emits a dull sound of "hits, clicks", and has no rhyme and elasticity. K gold has sound rhyme, sound, elasticity, the greater the elasticity, the more the rhyme, the more old, the worse the color.
5. Use the test goldstone to identify the color
The use of the gold -pairing card (the gold medal identified in 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.
. Use acid dot
The golden roads that have been identified and paired on the testing stone, respectively, and test nitric acid on the golden road with glass sticks. , 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.
(1) See color: the higher the purity of the gold jewelry, the deeper the color. 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 %, and the white light is only 50--60 % white light. 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 jewelry feels lightly. 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 tooth marks. High -colored gold jewelry is low in 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: Throwing the real gold with more than 99 % to throw it on the hard ground, 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 the 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 are all, indicating that it is a fake gold jewelry.
(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.
Pay content for time limit to check for freenAnswer Hello, 1. Look at the color, the higher the purity of the gold jewelry, the deeper the color. 2. The weight, the gold jewelry should be sinking in the hand, and the fake gold jewelry feels lightly. 3. Listening to the sound, the real gold with a color of more than 99%is thrown on the hard ground, it will make a click, there is no rhyme or elasticity. The fake or low golden sound is crispy but no dullness. Generally, the sound is made, and there is a loud sound. 4. Looking at the mark, the domestic gold jewelry is allicized and prepared according to international standards, and the killing records, such as "24K" indicate "foot red" or "foot gold", 18K gold standard "18K".
. Observation. Gold is the seven green eight yellow, yellow nine purple ten red. It means that the golden yellow gold content is 70 %, the yellow gold contains 80 %, the purple yellow gold contains 90 %, and the red yellow contains almost 100 %. (2) Look at the proportion. Gold is the largest proportion of the material, and its proportion is 19.37, and the same weight brass; the size of the red copper volume is much larger than the gold of the same weight. Those who have experience, look at the color, weigh the weight, and know one or two. (3) It can be compared with hardness, burning with fire, and using a acid solubility method to identify gold. The reddish hardness is the smallest. You can bite the marks with your teeth. You can use a large needle to draw the pattern. The real gold is not afraid of the fire. Flash, the other metals will be oxidized and discolored as soon as it is burned. Real gold is not soluble in a single acid (such as, hydrochloric acid, sulfuric acid), other metals are not as good as gold reference materials: Life Encyclopedia
Preliminary books are easier to master. There are four main methods:
. Differential color. Looking at the color of the golden appearance, commonly known as "seven greens, eight yellow nine five red", pure gold light and glitter, mixed gold there is a numbness.
. Looking at whether it is commensurate with the size of the size, the shape is large and lighter may be adulterated.
three, compromise. The gold jewelry is folded with the hand, the softer is high -definition gold, and the low and mixed are not soft. Small piece of gold can be bent with both hands, the clear gold is soft, with wrinkles at the folding; the low -colored steel is hard;
four, knocking. Two of the same gold jewelry collided, the high -colored person's voice, low golden sound, mixed gold, his voice became fooled.