5 Comments

  1. Darnell says:

    1. One of the fastest ways to identify the fastest of the authenticity of the gold in gold. The proportion of gold and other precious metals is about 19-32, so gold is heavy than metals such as silver, copper, lead and other metals.
    The same volume of gold is more than 40 % heavier than silver, 1.2 times heavier than copper, and 6.1 times heavier than aluminum. Therefore, the gold jewelry should have a feeling of sinking in the hand. This method is not applicable to gold jewelry inlaid with gemstones.
    2. Look at the color method
    The higher the purity of the gold jewelry, the darker the color. We can determine the general color of gold according to the following colors:
    The color of the golden yellow golden purity of the color is more than 95 %, the purity of light red yellow is 90--95 %, and the purity of light yellow is 80--85 %, The purity of the cyan yellow is 65-70 %, the color of the white light is only 50--60 %, and the slightly yellow and white purity is less than 50 %.
    Pynasia, the Qiqing, Eight Huang, and Jiu Chi can be used as a reference for identifying the authenticity of gold.
    The fastest way to identify the authenticity of gold and falseness is the above -mentioned weight method and the color method. Of course, we have many other fast methods to identify the authenticity of gold. It is recommended to understand more and compare more.

    3, magnet test
    This is a simple test, but it is not a sufficient proof to prove whether it is true gold. You can find a powerful magnet for testing.
    Gold is not a magnetic metal. If your product is attracted by magnets, it is enough to prove that this product is not gold. But you can't prove that it is gold because your product does not respond to magnets, because there are many non -magnetic metals.
    4, bite test
    everyone has watched movies, and the mininger bite gold to test it. I also saw that when the Olympic athletes won the gold medal, they would bite their "gold" medal. How simple this test is.
    In a gently bite to check your bite marks. The deeper the bite marks, the higher the purity of the gold.
    The expansion information:
    1. Whether the gold has white highlights
    In the material cutting the gold bar or gold jewelry, and observe the cut surface with a magnifying glass. Together, it means that the gold is mixed with 铱.
    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.
    Reference materials Source: Baidu Encyclopedia-Gold Differential Mixed Mixed Mixed

  2. Joseph says:

    Look at the hardness: pure gold is soft and low, and the nails can be used to draw shallow marks. The teeth can leave the dental marks. The high -quality gold jewelry is lower than the soft color. Hardness, pure gold is soft, easy to bend, the lower the purity, the less likely to bend.
    Listening to the sound: The real gold with a color of more than 99 % is thrown to the hard ground, which 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.
    Pucting information:
    The steam emitted when the gold is melted is yellow -green; its gold powder is usually brown during the smelting process; Light.
    The color of gold is golden yellow, metal luster, difficult to break down. The density is 19.3g/cm3, and the melting point is 1064.4 ° C; it has good ductility and can be pressed into thin foil. It has extremely high heat transfer and conductivity. The resistance of pure gold is 2.4P. Pure gold has good anti -chemical corrosion and is the best electroplating material.

  3. Carlton says:

    Pay content for time limit to check for freenAnswer Hello, I am your respondent, please wait, I am giving you the best answers and suggestions according to your question. You only need to wait patiently for a while. I will reply to you in five minutes. Thank you very much for your patience.nThe method of identifying gold is: 1. Observe the color, the higher the purity of the gold, the deeper the color; 2. Burning, using fire to burn gold, if the surface is not changed, it is true; If it is true, the texture of gold is softer.

  4. Emily says:

    Specifically, it can be divided into the following small methods:
    1. The texture of real gold is softer, 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".
    . The real golden color is biased towards dark yellow. If the color is too red into pseudo -gold, the shallow color is generally silver or aluminum mixed alloy. 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 is 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.
    5. The gold jewelry that will be identified with fire will be burned red (do not melt the jewelry), and wait for the cooling to observe his color change. If the surface luster is unchanged, the original golden color is pure gold; if the color becomes darker or different degrees of darkness, it means that this gold jewelry is not pure gold, and the earrings are mixed with other impurities. Generally speaking, the lower the golden color, the stronger the color, and the all darkened, indicating that it is a fake gold jewelry.

    6. Look at the mark. Normally, there will always be some signs behind the gold jewelry. Domestic gold jewelry is allicized and prepared according to international standards, and stabs, such as "24K" indicates "foot red" or "foot gold". You can distinguish the authenticity of gold jewelry based on these tags.

  5. Timmy says:

    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.

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