How to verify the authenticity of gold, and how to verify the authenticity of gold?

1. Color identification:

**Can be distinguished by color, different colors** color is also different. When gold is reddish-yellow or yellow-red, the gold content can generally reach 90%. to 95% **, while yellow gold content is generally above 80%, while turquoise is around 70%.

2.Sound Discrimination:

**Can be identified by sound. **There will be a dull and muffled sound when hitting and throwing, and it will be less elastic. If it's flexible, make it. If the voice is long and high-pitched, accompanied by a sonorous sound, it is fake gold.

3.Hardness identification:

**Can be distinguished by its hardness. Generally, the hardness of ** is relatively low. Scratching with a pin or fingernail cap may produce scratches. And**There will be folds when bending, which are generally fish scales, and if there is none, it is fake**.

One of the most valuable and sought-after metals in the world, there is a wide variety of jewelry, and many jewelers make a variety of jewelry that will make an impression. But the problem is that there are always some criminals who are making fake ** jewelry, and some of them can even be fake. This results in a lot of people not being able to identify them properly.

They may be made into bracelets, necklaces, or even some kind of jewelry. Jewelers usually make certain markings on it so that they can discern it with a magnifying glass.

So, as ordinary people, do we have some way to distinguish them? The answer is yes. There are some scientific ways we can detect and identify them.

This time, we have sorted out 6 tips that teach you how to identify the real from the fake.

01. Floating test.

Prepare a tall glass, fill it with water, and you're ready to start testing. Throw the metal into it, and the solid gold jewelry will quickly sink to the bottom. Imitation gold and other metals may float above the bottom or even completely above the water.

In addition, real gold does not rust or discolor when wet.

2. Magnet test.

The easiest test is to use magnets, real gold can never attract magnets. The magnet is easy to carry, you can feel free to carry it in your pocket, and it is easy to test. There are quite a few imitation gold and other alloys that attract magnets.

So, just get close to them with a magnet and see if they will be attracted by the magnet to tell if it's real or fake.

0. **Test.

We can even test it with **. People who have worn fake jewelry may have encountered cases where it causes discoloration, but you can also try to test its authenticity directly. Just hold the metal in your hand for a few minutes, and it's best to do so in hot weather.

Wait for your ** to sweat, and after the sweat reacts to it, observe the same changes. If it is fake, it may be discolored and may be black or green. And the real ones don't make a difference.

4. Vinegar test.

The white vinegar that is very common at home can also be used to detect the authenticity of **, but it is best to operate it with a dropper. You can start by inhaling some white vinegar with a dropper and dripping it on the **. Or place the metal on a flat surface with paper towels and a few drops of white vinegar on top of the **.

If you notice that it has changed color, it is fake. Usually, it will not change color because of this.

5. Acid test.

If you have liquid nitric acid in your home, you can also try it for testing. And it works for most ***. At the time of testing, use a dropper to drop a drop on top of the metal to see if there is a reaction on it, and the fake gold will immediately turn green where the acid appears.

The ** on sterling silver will turn milky white. Gold does not react with nitric acid, and the result is only a drop of clear liquid that does not change color.

6. Ceramic test.

Prepare a ceramic plate that has not yet been glazed, and then put the metal on it to apply a little pressure to see if gold will appear on the ceramic, some cases are true, if black appears, it is fake.

Biting is one of the ways to distinguish the authenticity!

There are about four ways to distinguish the true from the fake that we use every day:

First, the color ** is seven green, eight yellow, nine purple and ten red. It means that the gold content of blue-yellow is 70, the gold content of yellow is 80, the gold content of purple-yellow is 90, and the gold content of reddish yellow is almost 100.

Second, look at the specific gravity.

** is the largest specific gravity of any known substance, with a specific gravity of the same weight of brass; The volume of red copper is much larger than the same weight of **, red gold. Experienced people, look at the color, weigh the weight, you will know a thing or two.

3. Specific hardness.

Red gold has the least hardness, and it can be bitten out with teeth and scratched with a pin.

Fourth, fire burning real gold is not afraid of fire, burned in the flame, still golden, other metals will oxidize and change color as soon as they are burned.

In addition, real gold is not soluble in a single acid (e.g., hydrochloric acid, sulfuric acid), and other metals are not as good as gold.

1. Whether there are white bright spots.

Cut the gold bar or gold jewelry with material scissors, observe its cut surface with a magnifying glass, if you see white bright spots, because ** and iridium cannot be fused together, it means that the ** is mixed with iridium.

2. Measure the specific gravity.

Measure the weight of a pure gold bar with a balance, then place the bar in a measuring cup and pour water over the bar. Then put the gold bar to be tested into the measuring cup, observe whether the scale of the water rises or falls, as long as it changes, it means that the gold bar is not pure gold. However, this method does not apply to gold jewelry, because there is air in it.

3. Real gold is not afraid of fire.

Put the gold bars or gold jewelry on the fire for a while and observe the changes. Because iridium will oxidize with oxygen in the air, gold bars of insufficient purity will turn gray; Pure gold, on the other hand, will be red and shiny in color after being roasted by fire. However, this method may be destructive to jewelry.

There are six ways to test the authenticity of **:

1. Visual inspection.

1. Check the official logo of **. It is generally engraved with 999 or 990, or 10k, 18k, 22k, 24k. Anything below 10k is not considered because the gold content is too low. If you look at it with a magnifying glass, you will look more closely.

2. There will be no obvious official purity mark on the ancient ** jewelry.

3. Of course, counterfeit ** jewelry will also have official logos, so further inspection is required.

4. Look for obvious discoloration. Inspect the wear areas on the surface, usually at the edges of the product, and check for discoloration there, if the color fades away and changes to another color, then the product is just gold-plating.

2. Bromine chemical test.

1. Put the ** product into the alcohol solution and shake it for a while.

2. Soak a piece of filter paper in the alcohol solution.

3. At this time, the filter paper turns gray-purple.

4. Drop 4 drops of bromo-A reagent to the filter paper, if the filter paper turns white, then this ** product is real gold.

The entire test takes 20 minutes.

3. Magnet test.

It's a simple test, but it's not a sufficient proof of whether it's real gold or not. You can find a strong magnet to do the test.

**Not a magnetic-containing metal, if the product is attracted to a magnet, it is enough to prove that this product is not**. But just because the product doesn't react to magnets doesn't mean it can't be proven, because there are many non-magnetic metals.

Fourth, the density test only a very small number of metal density more than **. Pure 24k** has a density of about gram milliliters, which is much higher than other metals. The density test method is enough to prove that the product is the best.

The higher the density, the higher the purity. Please make sure that there are no gemstones attached to the product.

1. If there is no equipment in this area, jewelry stores can usually do density tests.

2. You can put the ** product into a container full of water, and then test the volume of the overflow water, and then divide it by the weight of the weighed product, which is the density of the ** product. Keep in mind that there are different proportions of grams to milliliters for different purities: 14k grams of milliliters 18k** - to grams of milliliters 18k platinum - grams of milliliters 22k - to grams of milliliters.

5. Bite test.

Miners test it by biting the gold. When an Olympic athlete wins a gold medal, he bites the "**" medal, how simple is this test.

1. Take a gentle bite.

2. Check the bite marks, if the bite marks are deeper, the higher the purity of **.

Actually, this is not a recommended test, which can damage the teeth. What's more, it will give ** lead plating, which is softer.

6. Ceramic scratch test method.

1. Use unglazed ceramics. If you don't have this, you can buy it from a ceramic shop.

2. Scratch the **product with ceramic, if it is a black scratch, it means that the product is not**, if it is a golden scratch, it proves that the product is**.

The simplest is to burn with fire, real gold is not afraid of fire This method can only inspect the surface of gold, and if you want to further inspect it, you need to melt it or use an instrument at the testing station.

The most direct way is to go to the pawnshop to be a pawnshop, those people will naturally help you check the authenticity, pure **, there will be tooth marks when you bite your teeth, and there will be no fake ones.

You can go to some gold shops and ask them to help you burn and see, the red is real gold.

The best way is to go to the People's Bank of Chinese, they can verify ** true or false for free.

Go to the quality supervision institute for laboratory testing or buy physical experiment tools to measure by yourself according to the density formula of **.

Teach you how to distinguish between true and fake? Don't rush to teach you three tricks, come and get it.

There are six ways to test the authenticity of the **

1.Observation and color identification. ** is "seven green, eight yellow, nine purple and ten red".

2.Sound discrimination. Let the jewelry fall to a hard place, and the sound is dull, indicating that the color is good; The sound is crisp, indicating poor color.

3.Bend identification method. Bend the jewelry with both hands, real gold is soft, easy to bend and not easy to break, fake or gold-filled is generally easy to break and not easy to bend.

4.Scratch identification. If you scratch the surface of real gold with a hard needle, there will be obvious marks, and the fake traces will be blurred.

5.Gravimetric method. ** is the largest specific gravity of the known substance, its specific gravity is 19:37, the same weight of brass, red copper, the volume is much larger than the same weight of **, red gold, look at the color, and then use your hands to weigh the weight, you can know.

6.Fire identification method. Real gold jewelry can be burned with fire to last and does not change color, while fake jewelry is not fire-resistant, and will turn black-brown after burning, and will lose its luster.

You can choose the right method for your needs.

Hello dear, to detect the authenticity of **, you can use the following methods:1Looking at the appearance, the real ones usually have a bright and consistent golden yellow color, and different purities and alloy ratios may have different colors.

Genuine** in light will shoot lead with a soft sheen, while inferior ** may have a dull appearance. 2.**Usually not magnetic, you can judge the authenticity of ** through magnetic testing.

Hold a strong magnet close to it, if it is attracted or caught by the magnet, it may be a counterfeit or doped with other metals. 3.**Has a higher density and is generally heavier than other metals.

Density testing can determine the purity of **. This test involves the use of a specialized instrument called a density meter, which measures the density of a sample to determine its purity. Items with normal density may be ** or other metals of similar density.

4.Acid testing is a common method that can be used to detect the authenticity of **. This test involves exposing a small piece of an unknown metal to different concentrations of an acid in order to observe its reaction.

The real ** is not attacked by most acids, while most counterfeit metals such as copper or gold plating react. This kind of testing requires experience and caution and should be performed in a suitable environment. 5.

If you still have doubts about the authenticity of **, give the **sample to a trusted jeweler or gold jewelry store to help test it. Moriga rent.

The metal detector is a detector used to detect metal content, which can accurately measure the composition of **, so as to judge the authenticity of wide eggplant**. 2.Magnetic Detection:

Magnetic scrutiny detection can detect the magnetism of **, the real ** will not be attracted by the magnet, if ** is attracted by the magnet, it means that ** is false. 3.By specific gravity detection:

The specific gravity of the real ** is, if the specific gravity is lower, it means that the ** is false. 4.Tested by pickling:

Put ** in an acidic solution, the real ** will not be corroded, and if it is corroded, it means that ** is fake. Hope mine can help you!