How to distinguish the authenticity of gold

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

  1. The method is shown in the following
    1 Seeing color
    This can be generally distinguished from the different luster and color of the 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".

    2 掂 掂
    D gold weight is about double 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.

    3 Listening to the sound
    When the golden jewelry with high color is hit or throw it hard, the dull sound of "daedy, daemon" is made. There is no elasticity, K gold has sound 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, 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.

    5 Testing goldstone is identified as a color
    The use of the determined gold and the subject's first jewelry on the test gold stones 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 -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.

    6 uses acid points
    The golden golden and comparison gold on the testing stone, and test nitric acid on the gold road with a glass stick. 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 -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.

    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. Gold; if the color becomes darker or darkened to varying 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.

  2. 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

  3. Pay content for time limit to check for freenAnswer Hello! I am helping you to organize answers, watching your questions, I hope my answer can help you help youn1. Nitric acid inspection method: Put the gold in a stainless steel container and drop a drop of nitric acid on the gold. If the gold surface appears green, it means that it is ordinary metal or gold plating. 2. Magnet detection method: Use magnets to suck gold. If the magnet can suck the gold, it means that it is fake. 3. Weight comparison method: Gold with the same volume is more than 40%heavier than silver, 1.2 times heavier than copper, and 6.1 times heavier than aluminum. Gold entrustment has a feeling of sinking in hand, while fake gold flutter lightlynAsk the question just after buying this day, I doubt it is a fake, the teacher, the teacher should take a look at itnIntersection Intersection IntersectionnAnswer like falsenJust one day, it feels like gold -platednQuestions about the characters in the characters in the same way are also white insidenCan't deduct it, I can't wash it. I just bought it yesterdaynThe answer feels like false, you can go to the shop to ask questionsnI was afraid that I was afraid that they would quibble me to ask me to ask onlinenThe answer is okay, you just say that it is just like thisnMore 10nBleak

  4. 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 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.
    The accuracy of gold jewelry has two common methods.
    (1) Testing gold stone method: Select the black test gold stone with delicate texture, use the standard gold medal (pair gold medal) with different gold content (on the gold medal), and then draw the gold jewelry sample you want to identify Sales, remove the impurities with concentrated nitric acid, and find out the traces left on the test gold stones compare with the traces of the tested slices that are drawn, and find the same color as the jewelry sample. The accurate gold content of the sample.
    (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.

  5. Teach you to distinguish the magic tricks of true and false gold, simple and fast. In the future, when buying gold jewelry is not afraid of being deceived

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