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.
There are many ways to identify gold jewelry. The Chinese folk summarizes a set of simple methods. The formula is: seeing color, weight, listening rhyme, folding hardness, stone grinding, contrasting cards, use of acid dots, and coloring. The first four sentences depends on the eyes and the feeling; the latter four sentences need to be used by tools and reagents. . Seeing the color and color of the color according to the different gloss and color of the gold, you can generally distinguish the pure gold, K gold, real gold and 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". . The density of density 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 hardness, and can be compressed 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 points to grind the golden trail of identified jewelry and cards on the test stone. Try the nitric acid on the golden road with a glass stick. Change. 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.
Pay content for time limit to check for freenWhat are the domestic gold appraisal agencies? General shopping malls and gold shops can identify the authenticity of gold, but they cannot identify the gold content of gold, and these appraisal agencies lack credibility, consumers have doubts about the identification results, so gold shops such as gold shops are not completely recognized by consumers. In fact, there are generally gold jewelry appraisal centers in each region. Especially in the provincial capital cities, there are precious metal appraisal centers, which can identify the authenticity and purity of gold. For specific identification addresses and contact information of each city, you can check or dial 114 on the Internet to understand in detail, or go directly to the gold shop to ask where you can identify gold jewelry. In fact, in addition to learning the authenticity and purity of the professional appraisal agency, you can also directly identify it through other methods, such as: 1. The color appraisal method can distinguish the pure gold, K gold, and real gold according to the different luster and color of the color. , Fake gold. Red yellow gold is better, 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 -formed at about 50%. The folks are called "seven greens, eight yellow, nine five red, and yellow leucorrhea ash." If it is a gold jewelry with a long storage time, there is a saying that "copper turns green, silver turns black, and gold will never change color". Therefore, the more positive the golden color, the higher the purity. 2. Listening to the rhyme and elasticity of the sound appraisal method. When a high -quality gold jewelry is knocked down or threw hard to throw it, it will make a bright and low voice of "hits, cotton", and has no rhyme, no elasticity, K gold sound rhyme, sound, elasticity, the more elasticity, the more elasticity, the more elasticity, the more elasticity, the more elasticity, the more elasticity. The more the rhyme, the more the elders, the worse the color. Therefore, the higher the purity of gold, the smaller the elasticity and the lower the sound. 3. You can also use a professional goldstone to identify it, operate in accordance with the specifications, and then use the contrasting color to definitely make the gold jewelry.nWhat are the domestic gold appraisal agencies? General shopping malls and gold shops can identify the authenticity of gold, but they cannot identify the gold content of gold, and these appraisal agencies lack credibility, consumers have doubts about the identification results, so gold shops such as gold shops are not completely recognized by consumers. In fact, there are generally gold jewelry appraisal centers in each region. Especially in the provincial capital cities, there are precious metal appraisal centers, which can identify the authenticity and purity of gold. For specific identification addresses and contact information of each city, you can check or dial 114 on the Internet to understand in detail, or go directly to the gold shop to ask where you can identify gold jewelry. In fact, in addition to learning the authenticity and purity of the professional appraisal agency, you can also directly identify it through other methods, such as: 1. The color appraisal method can distinguish the pure gold, K gold, and real gold according to the different luster and color of the color. , Fake gold. Red yellow gold is better, 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 -formed at about 50%. The folks are called "seven greens, eight yellow, nine five red, and yellow leucorrhea ash." If it is a gold jewelry with a long storage time, there is a saying that "copper turns green, silver turns black, and gold will never change color". Therefore, the more positive the golden color, the higher the purity. 2. Listening to the rhyme and elasticity of the sound appraisal method. When a high -quality gold jewelry is knocked down or threw hard to throw it, it will make a bright and low voice of "hits, cotton", and has no rhyme, no elasticity, K gold sound rhyme, sound, elasticity, the more elasticity, the more elasticity, the more elasticity, the more elasticity, the more elasticity, the more elasticity. The more the rhyme, the more the elders, the worse the color. Therefore, the higher the purity of gold, the smaller the elasticity and the lower the sound. 3. You can also use a professional goldstone to identify it, operate in accordance with the specifications, and then use the contrasting color to definitely make the gold jewelry.
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.
There are many ways to identify gold jewelry. The Chinese folk summarizes a set of simple methods. The formula is: seeing color, weight, listening rhyme, folding hardness, stone grinding, contrasting cards, use of acid dots, and coloring. The first four sentences depends on the eyes and the feeling; the latter four sentences need to be used by tools and reagents.
. Seeing the color and color of the color according to the different gloss and color of the gold, you can generally distinguish the pure gold, K gold, real gold and 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".
. The density of density 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 hardness, and can be compressed 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 points to grind the golden trail of identified jewelry and cards on the test stone. Try the nitric acid on the golden road with a glass stick. Change. 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.
Pay content for time limit to check for freenWhat are the domestic gold appraisal agencies? General shopping malls and gold shops can identify the authenticity of gold, but they cannot identify the gold content of gold, and these appraisal agencies lack credibility, consumers have doubts about the identification results, so gold shops such as gold shops are not completely recognized by consumers. In fact, there are generally gold jewelry appraisal centers in each region. Especially in the provincial capital cities, there are precious metal appraisal centers, which can identify the authenticity and purity of gold. For specific identification addresses and contact information of each city, you can check or dial 114 on the Internet to understand in detail, or go directly to the gold shop to ask where you can identify gold jewelry. In fact, in addition to learning the authenticity and purity of the professional appraisal agency, you can also directly identify it through other methods, such as: 1. The color appraisal method can distinguish the pure gold, K gold, and real gold according to the different luster and color of the color. , Fake gold. Red yellow gold is better, 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 -formed at about 50%. The folks are called "seven greens, eight yellow, nine five red, and yellow leucorrhea ash." If it is a gold jewelry with a long storage time, there is a saying that "copper turns green, silver turns black, and gold will never change color". Therefore, the more positive the golden color, the higher the purity. 2. Listening to the rhyme and elasticity of the sound appraisal method. When a high -quality gold jewelry is knocked down or threw hard to throw it, it will make a bright and low voice of "hits, cotton", and has no rhyme, no elasticity, K gold sound rhyme, sound, elasticity, the more elasticity, the more elasticity, the more elasticity, the more elasticity, the more elasticity, the more elasticity. The more the rhyme, the more the elders, the worse the color. Therefore, the higher the purity of gold, the smaller the elasticity and the lower the sound. 3. You can also use a professional goldstone to identify it, operate in accordance with the specifications, and then use the contrasting color to definitely make the gold jewelry.nWhat are the domestic gold appraisal agencies? General shopping malls and gold shops can identify the authenticity of gold, but they cannot identify the gold content of gold, and these appraisal agencies lack credibility, consumers have doubts about the identification results, so gold shops such as gold shops are not completely recognized by consumers. In fact, there are generally gold jewelry appraisal centers in each region. Especially in the provincial capital cities, there are precious metal appraisal centers, which can identify the authenticity and purity of gold. For specific identification addresses and contact information of each city, you can check or dial 114 on the Internet to understand in detail, or go directly to the gold shop to ask where you can identify gold jewelry. In fact, in addition to learning the authenticity and purity of the professional appraisal agency, you can also directly identify it through other methods, such as: 1. The color appraisal method can distinguish the pure gold, K gold, and real gold according to the different luster and color of the color. , Fake gold. Red yellow gold is better, 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 -formed at about 50%. The folks are called "seven greens, eight yellow, nine five red, and yellow leucorrhea ash." If it is a gold jewelry with a long storage time, there is a saying that "copper turns green, silver turns black, and gold will never change color". Therefore, the more positive the golden color, the higher the purity. 2. Listening to the rhyme and elasticity of the sound appraisal method. When a high -quality gold jewelry is knocked down or threw hard to throw it, it will make a bright and low voice of "hits, cotton", and has no rhyme, no elasticity, K gold sound rhyme, sound, elasticity, the more elasticity, the more elasticity, the more elasticity, the more elasticity, the more elasticity, the more elasticity. The more the rhyme, the more the elders, the worse the color. Therefore, the higher the purity of gold, the smaller the elasticity and the lower the sound. 3. You can also use a professional goldstone to identify it, operate in accordance with the specifications, and then use the contrasting color to definitely make the gold jewelry.
At the bank, the bank has a special inspection of goldenness.
Go to the gold shop to identify that they have instruments, but don't go to the small dots outside