1: Put gold in water and see if it will sink.
Find a container that can hold enough water and the gold products you want to test. The water temperature does not affect the test results, just warm water. Real gold has a high density and will sink directly to the bottom. Imitation gold products tend to be lighter, so they may float. 1 real gold will not rust and lose its luster even if it is wet. So if you find discoloration, it's probably just gold plating.
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Drop a few drops of vinegar on the gold.
Put jewelry or gold on a flat surface. Drop a little vinegar on it with a dropper, and then let it stand for about 15 minutes. Real gold does not change color, while fake gold generally changes color. You can also soak gold in a glass container filled with vinegar 15 minutes. This method is slightly risky, because vinegar may damage the semi-precious stones on gold jewelry.
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3. Is there any obvious color difference where you see through it?
Gold is a very soft metal, and the gold-plated layer is easy to wear over time, while the edges of jewelry and coins often rub against skin and clothes, so they are the best places to check the authenticity. If you find other metals under the coating, then this thing is only gold plated, not real gold. [3] For example, silver can be silver or titanium. Red may be copper or brass.
Our experts believe that discoloration or suspicious spots on the edge of an object usually indicate that it is not gold. However, some gold less than 24K may lose its luster after a long time, because the cheap metal contained in it will be oxidized when it comes into contact with air.
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4. Observe whether there are traces caused by wearing or touching gold on the skin.
Pure gold will not react with sweat or grease on the skin, so if you see black or green marks on the skin, it is from other metals. Silver will leave a black mark, and copper will leave a green mark. If obvious traces are found on the skin, it means that gold may not be as pure as you think. [4] Remember that most gold products are alloys of gold and other metals. Even 14K jewelry with a gold content of 58.3% will leave such a mark. Other tests can also be used to verify the authenticity of gold.
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5. Absorb gold with a strong magnet.
This detection method requires a magnet with strong magnetism, which can attract magnetic metals even if it is mixed with various metals. Shake the magnet above the gold product and observe its reaction. Gold has no magnetism, so it will not be attracted by magnets. If a magnet is attractive to it, it is either impure or fake. 5 Ordinary magnetic kitchenware is not applicable. You may have to buy a strong neodymium magnet from the household goods store. Magnetic testing is not a foolproof testing method. Some imitation gold products may be made of nonmagnetic metals such as stainless steel, and some real gold products may also contain magnetic metals such as iron.
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6. Rub unglazed porcelain with gold to see if it will leave traces.
Be sure to use unglazed porcelain. Glazed porcelain will affect the test results. Drag the gold you want to test onto the porcelain plate until you see something scraping it off. If you see a black line, it should not be true. If it is gold, it should be real gold. [6] Try to find an unglazed tile or plate online or in the local household goods store. This test method will scrape off a little gold, but usually it will not cause obvious wear and tear to this item. This method is much safer than other tests that require friction or acid. Another way is to apply a little foundation to your skin, and when it is dry, drag your gold ornaments on this foundation. Imitation gold products often react with foundation to form green or black marks. /news app _ Bt/0/ 14883302546/64 1