4 thoughts on “How to distinguish the authenticity of gold”

  1. Bite gold is one of the ways to distinguish the authenticity of gold! The following four methods of identifying the authenticity of golden and false in our daily use are probably the following four: First, the golden gold is the seven blue eight yellow, the 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 %. Second, the proportion gold is the largest proportion of the material, and its proportion is 19.37, and the same weight of brass; the volume of the red copper 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. Third, the hardness of the hardness is the smallest, and the teeth can be bitten out with the teeth. Fourth, the fire burning the real gold is not afraid of the fire, burned in the flames, and it is still glittering. The other metals will be oxidized and discolored as soon as it is burned. In addition, the real gold is not soluble in a single acid (such as, hydrochloric acid, sulfuric acid). Other metals are not as good as gold. 1) Look at the 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.

  2. 1. Look at 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.

  3. Pay content for time limit to check for freenGood night! I picked up a gold and wanted to distinguish between true and false, the proportion of gold, but soft, and traces of bite with teeth.nYou can post a picture to seenPoor copper and lead in injectionnLooking at the things in your hand, 80%are not gold 80. Try it with your teeth, it is easy to leave a marknIf it is gold, it will be worth 5,000 yuann4 morenBleak

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