5 thoughts on “How to identify the authenticity of gold?”

  1. 1
    The color
    Ben according to the different gloss and color of the gold, you can generally distinguish 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 long -term gold jewelry, there will be a saying that "copper turns green, silver turns black, and gold will never change color".
    This weight
    This is about double the weight than the same volume of 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.
    In listening to the sound
    When the high -quality gold jewelry is hit or throwing it hard, the dull sound of "hits, clicks" is emitted, there is no rhyme or elasticity, K Jin has the rhyme, sound, and 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.
    Table hardness
    The gold with high color, with large head needles or nails, can leave traces. More than 97%of the gold jewelry, after two or three times, wrinkles appeared at the bend, also called fish scales; about 95%of gold jewelry, it feels hard when bending, and the fish scales are not obvious; The jewelry is very hard when the bending is bent, and there is no fish scale pattern; the gold jewelry containing more impurities, the bend is twice or three times to break; 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.
    The test goldstone is identified into color
    The use of the determined gold and the test first jewelry to grind the road on the test gold stone. By comparing the color, the gold jewelry is determined. 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 -containing gold: light color transformed micro -band -inflammatory green; gold containing gold greater than 25%: earth white; copper gold: deeper color, red color tone; silver copper containing copper; Gold: yellow; gold containing zinc, same, nickel: white gold.
    In acid spots
    Man the golden latch on the testing stone, respectively, and test the nitric acid on the golden road with a glass stick. , 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 -quality disappearance is fast, and the high color disappears slowly; Depending on the disappearance of its golden road, the comparison of the comparison can determine the color of gold jewelry.
    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 surface is still golden, it is pure gold; 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. 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.

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    The identification of gold jewelry
    Id identifying gold requires certain experience. Here are only some identification methods.
    (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.

  3. Pay content for time limit to check for freenAnswer Hello, I am a respondent in the financial field, "Talking about stocks and gold", and has been engaged in financial and legal work experience for many years. I have seen your question. Time, please wait patiently. I will provide you with the most detailed answers in 5 minutes, and will not reply to you, thank you!nQuestion hellonAnswer Hello, dear, please wait, I am looking at your question,nHello, dear, I can fully understand your mood. If you are anxious, send it to you in sections for your reference. The first method: Look at the printing of the gold jewelry. , Or a thousand -footed character print, this is the word print that the state requires gold jewelry, mainly to buy it in a regular jewelry shop. In addition, it is generally determined that it is true.nThe second method: weighing, the density of gold is 19.32, so a little bit, it has a sense of heavyness. If a gold jewel Only 1 or 2 grams, then this gold jewelry may be fakenThe third method is to see the hardness: the hardness of the gold is 2.5, very soft, and the ductility is good, so the general gold chain is easy to break, but the disconnected mouth is not so crispy. The feeling of sandwicking biscuits is not uniform. This is caused by the ductility of gold.nThe fourth kind of fire burns: This is the golden yellow color that uses professional jewelery to cooler the golden burning, which is really golden.nIf you have other questions, you can consult me ​​or leave me a message at any time, I will reply to you as soon as possible, dear,n6 morenBleak

  4. Among the longest views of people in the society, there are sand gold in the society; there is a colorful gold in cooked gold; the colorful gold is mainly based on all kinds of gold, gold strips, and gold utensils. The general method of identifying these gold authenticity is to use nitric acid. Most of them are gold, but there are also white gold (platinum) and a few precious metals.
    The adulteration methods in sand gold, mainly:
    The sand gold plating of brass, mixed copper and yellow iron mines;
    The silver -doped silver -mixed silver gold;
    The sand gold at the end of the furnace tank.
    ● Generally, the first type of adulteration sand gold can be preliminarily determined whether it is fake with an emergency burning. ; Or use sand acid to point its grinding road
    . If the grinding tract changes or disappears, it is fake sand gold.
    ● In the second type of fake sand gold, because silver is not easy to be burned and discolored, the sand gold group can be used to open the section under the magnifying glass. Tao, if there is a white spot, is a silver -mixed sand.
    ● The third type of sand gold is the most deceptive, because the furnace cylinder ash is not afraid of burning or sour. At this time If the grinding road disappears, it is true sand gold. If there are still obvious traces, it is a fake sand gold at the end of the cylinder.
    ● There are tips for people's common golden golden gold identification in cooked gold, that is: weighing weight, looking at color, discussion rhyme, softness, and acid. Because golden density is significantly greater than common metals such as copper, silver, lead, and zinc, it is about twice as much as the same volume of silver and copper. If the items are gold, there is a heavy feeling. This is the "gold pending" of the people's ministry, otherwise it is light.
    ● Gold has its unique golden brown luster (low color exception). Pure gold will flashed with dazzling light under the strong light. This is not available in other metals, including copper inside.
    ● High -colored gold, the sound of the time when it is thrown in the ground has no rhyme and elasticity, and the golden sound quality with a low color is slightly brighter, and when the copper product is thrown on the ground, the sound is loud. Therefore, according to the sound of the knocks, we can help us distinguish between common metals and gold.
    ● Gold has the characteristics of good ductility and small hardness. Pure gold is folded and soft, and the bronze strips are laborious. Or use large head needles (nails are also fine). If the force is not large, the traces are obviously gold, and the copper is slightly larger and the traces are slightly worse. It is only difficult for gold bars, gold coins, bricks, and the like. The authenticity of the first judgment of gold is also effective, but it is necessary to use different orientation of the inspection objects. If the color of several grinding roads is obviously different, adulteration is undoubtedly mixed.
    ● When the above -mentioned several cooked gold identification methods are not believed, you can only use nitric acid, that is, use nitric acid to point its grinding road to determine its true or false.
    ◆ Golden jewelry identification
    1. When the authentic is bending with hands, it is soft and easy to bend. The jewelry was thrown on the floor and made a "click" sound. The fake sound was bright, and the fake sound was high, and it jumped higher than the real gold.
    3. The real color is dark yellow, the excessive red is pseudo -gold, and the light color is silver. Aluminum and other mixed alloys.
    4. It is really heavier. The fake is lighter.
    5. Really fire does not change color. After burning red, it is quenched into the water, and the color remains unchanged.

  5. 1. The texture of real gold is soft, which cannot be compared with other metals. Therefore, you can directly fold the gold with your hands. If you can bend directly with your hands, and it is easy to bend, it looks soft. In addition, the real gold will draw traces with harder things.

    2. Listen to the sound. If you throw the real gold with more than 99%of the color, you often make a sound. If the fake or low -colored gold is thrown on the ground, the sound will be crispy and no dull, and it usually emits a sound similar to "Dang Dang".

    3, the real golden color is biased towards dark yellow. If the color is too red into a pseudo -gold, the luster is generally silver, or the aluminum is mixed. The higher the purity of gold jewelry, the deeper the color.

    4, the density of gold is relatively large. Compared with silver, the same volume of gold weighs more than 40%, 1.2 times heavier than copper, and 6.1 times heavier than aluminum. In the same volume, the weight of the real gold is too heavy, and the fake is lighter.

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