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How to distinguish between true and false diamonds Five methods to distinguish between true and false diamonds

Catalogue method 1: diamond identification at home 1, fog measurement. 2. Check the base and ring. 3. Check the diamond with a jewelry magnifying glass. Method 2: Identify the authenticity of bare diamonds at home 1, and check the refractive index. 2. Observe the reflected light. Throw the gem into a glass of water and see if it will sink to the bottom. Heat this stone to see if it will break. Method 3: Identify the diamond 1 by professional methods and find someone to do the thermal probe test. 2. You can find someone to do the diamond/mosan test. 3. Microscopic identification method. 4. Diamonds can be identified by a high-precision balance. 5. Diamonds can be identified under ultraviolet light. 6.x-ray identification. Method 4: How to distinguish diamonds from other precious stones 1 and identify synthetic diamonds. 2. Identify Mosan stone. 3. Identify white topaz. 4. Identify white sapphires. 5. Identify cubic zirconia. Method 5: Find evidence to prove that the diamond is real 1, and find an authoritative diamond appraiser. 2. Ask the right questions. 3. Remember to ask for identification. Please check your certificate carefully. 5. Register your gems. Want to find out whether the diamond in your hand is real or not? Most people are curious and can't wait to know, but they don't know how to start, so they have to turn to professional jewelers for help. But in fact, you don't have to be as observant as Sherlock Holmes to find out whether a diamond is true or not. All you need is a little light, some water, a breath, and a jeweler's magnifying glass, and you can determine your identity. The following steps will tell you more details to pay attention to and take you into the wonderful diamond world.

Methods 1: Identify the diamonds at home.

1, fog measurement. Put the jewel in your hand in front of your mouth and take a deep breath. If the fog stays for a long time, a few seconds, it is probably false. Real diamonds dissipate heat quickly and are not prone to fogging. Even if you breathe first and then look, diamonds are still much clearer than fake diamonds. It's more helpful to compare a diamond that you know is real. You can see with your own eyes that real diamonds are not affected by fog, while fake diamonds will be covered by water mist. If you inhale repeatedly into the fake diamond, you can see that the fog is getting thicker and thicker. Every time you breathe, the fog on the surface of fake diamonds becomes more and more obvious, while the real diamonds are always clear and bright.

2. Check the base and ring. Real diamonds are unlikely to be placed on a cheap base. Generally speaking, there will be precious metal information (10K, 14K, 18K, 585,750,900,950, Pt, Plat, etc. ) at the base, either one is fine. The symbol "C.Z." means that diamonds are not real diamonds. This symbol stands for cubic zirconia, which is a kind of artificial gem.

3. Check the diamond with a jewelry magnifying glass. You can borrow one from a jewelry store. Natural diamonds often have some small flaws, which can be seen through a magnifying glass. What you look for through a magnifying glass is a defect formed by minerals, or a very subtle different color. These two phenomena are one of the evidences that diamonds are real. Although this diamond may not be perfect, at least it is true. Cubic zirconia and laboratory synthetic diamonds (the latter can usually pass all other types of identification) will not be flawed. This is because synthetic diamonds are synthesized in a sterile environment, rather than naturally formed in natural laboratories in nature. Therefore, if the GEM is too perfect, it is probably fake.

However, real diamonds can be perfect. But this is not the standard score who can identify the authenticity of diamonds. We must first eliminate fake diamonds by other methods.

Please note that laboratory synthetic diamonds are usually free of defects because they are synthesized in a carefully controlled environment. Gem-grade diamonds synthesized in the laboratory can be comparable to natural diamonds in chemical, physical and optical properties, and sometimes even better. This quality beyond "natural" diamonds has aroused great concern of people in the diamond mining industry, so they openly publicize that laboratory synthetic diamonds and "natural diamonds" are two different things. In fact, the diamonds synthesized in the laboratory are also "real" diamonds, but they are not "natural".

Method 2: Identify the authenticity of bare diamonds at home.

1, check the refractive index. The refracted light of the diamond is very sharp and bright, and the light can pass through it without hindrance, showing dazzling brilliance. However, materials such as glass or timing are not smooth because of their low refractive index. The refractive index of stone is extremely difficult to change, even if it is cut professionally, because the refractive index is one of the properties of stone itself. Therefore, by carefully checking the refractive index, the authenticity of the diamond can be more clearly determined. Here are several methods: newspaper method: turn the diamond upside down and put it on the newspaper. If you can see the words in the newspaper through the diamond, or even the vague black marks, then this stone is probably fake. Diamond has a high refractive index, so you can't see the writing in the newspaper through the diamond. There are exceptions: if the cutting is irregular, you may still see the words in the newspaper. )

Ink dot method: draw an ink dot on a piece of white paper with a pen and place the gem in the center of the ink dot. Look down at the ink dots vertically. If this stone is not a real diamond, you will see a round reflective pattern on the stone. If it's a real diamond, you won't see this ink through it.

2. Observe the reflected light. The reflected light of real diamonds will appear gray in different degrees. Looking down from the top of the diamond, if you see the reflected light of rainbow color, then either the diamond is of low grade or it is not a real diamond. In addition, you can also see if there is any flash. Real diamonds are brighter than glass and quartz stones of the same size. You can also find a piece of glass or compare it in time.

Don't confuse flash with reflected light. The cutting of gems will affect the intensity and brightness of reflected light, thus affecting the intensity of flash. Reflected light is the color of refracted light. So when you look at the flash, remember to look at the intensity of the light, not the color.

There is indeed a kind of stone that is brighter than diamond, and that is moissanite, also called Mosan stone. This kind of gem is so close to diamond that it is difficult for even a professional jeweler to tell it apart. If you want to distinguish mosan stone from diamond without special tools, you need to bring the gem to your eyes and penetrate it with the light of a flashlight. If you can see the reflection of rainbow color, it means that the gem has birefringence, and it is mosan stone, not diamond.

Throw the gem into a glass of water and see if it will sink to the bottom. Due to the high density, real diamonds will sink, while fake diamonds tend to float or suspend in water.

Heat this stone to see if it will break. Heat it for 30 seconds, then throw it directly into a glass of cold water. Short-term thermal expansion and cold contraction will cause fragile materials, such as glass and quartz stone, to crack from the inside. Real diamonds will have nothing.

Method 3: Identify diamonds by professional methods.

1, you can find someone to do the thermal probe test. The crystal structure of diamond is stable and firm, and it dissipates heat quickly. Therefore, it is not easy to heat the diamond. Probe testing for 30 seconds is usually free. And this test will not do any harm to GEM. This test is similar to the above-mentioned method of heating the gem to see if it will crack. It's just that this method doesn't use intense thermal expansion and cold contraction to see if the gem will break, but to see how long it can be kept warm.

If you want to have a professional diamond test, please find a reputable local jeweler online.

2. You can find someone to do the diamond/mosan test. Many jewelers have a special one that can quickly distinguish diamonds from mosan stones. However, the traditional thermal probe testing method can't help you to distinguish Mosan from diamond. So be sure to use a conductivity tester, not a temperature tester.

If you plan to identify a large number of diamonds at home, you can buy tools online or in a special diamond instrument store.

3. Microscopic identification method. Put the top surface of the diamond under the microscope. Gently turn the diamond back and forth with tweezers. If you see a faint orange glow between different sections, then this so-called diamond may actually be cubic zirconia. It is also possible that the diamond is flawed, and someone has filled these gaps with cubic zirconia. To achieve the best effect, it is best to use a microscope with a magnification of 1200.

4. Diamonds can be identified by a high-precision balance. The scale can also be used to identify the authenticity of diamonds. Cubic zirconia is about 55% heavier than diamonds of the same volume and shape. Very accurate scales can be accurate to carats or even smaller units, so diamonds can be identified by weight comparison. However, to use this method, you must have a firm object with a real diamond that is very similar in size and shape. Otherwise, if there is nothing to refer to, it will be difficult for you to find out whether the weight in your hand is right or not.

5. Diamonds can be identified under ultraviolet light. Many diamonds (but not all diamonds) will show blue fluorescence under ultraviolet light or dark light. So if you can see moderate intensity or bright blue light, it proves that the diamond is real. And if there is no blue light, it is undoubtedly a fake diamond. However, some diamonds do not fluoresce under ultraviolet light. And if the fluorescence is green, yellow, or gray, it proves that this stone is Mosan stone. Through the ultraviolet test, at least the scope of identification can be further narrowed and some possibilities can be ruled out. However, it is best not to rely solely on the test results to determine the authenticity of diamonds. As mentioned above, many diamonds do not show fluorescence under ultraviolet light. Moreover, after special treatment, fake diamonds will also fluoresce under ultraviolet rays. Under normal circumstances, fake diamonds will not fluoresce under ultraviolet rays.

6.x-ray identification. The molecular structure of diamonds is transparent to light. In other words, diamonds will not appear in X-ray images. Glass, cubic zirconia, and crystal lamps have only slight radiation penetration, so they will be clearly presented under X-rays. If you want to do X-ray inspection of diamonds, you can give it to a professional diamond appraisal agency or contact the local X-ray center.

Method 4: How to distinguish diamonds from other precious stones?

1. Identify synthetic diamonds. Of course, the diamonds or synthetic diamonds made in the laboratory are still "real" after identification. The cost of synthetic diamonds is only a fraction of the real diamonds in diamond mines, but they are the same as natural diamonds in chemical composition. Therefore, to distinguish the two, we need to ask for help from specialized professionals.

2. Identify Mosan stone. It's hard to tell a diamond from a mosan stone. Although mosan stone is more shiny and birefringent than diamond, it is still difficult for ordinary people to see it. You can try to let a light pass through the gem in your hand. If the reflected light is colorful and dazzling, it is probably Mo Sanshi. Diamonds and Mosanites have similar reactions to temperature tests. If you only use the diamond tester, even if what you have is mosan stone, the test results will tell you that it is a real diamond. Therefore, even if the results of the diamond appraiser or the Mosan stone appraiser alone tell you that the diamond is real, it is still very important to do the appraisal again. Usually, professional jewelers will use instruments that can identify both diamonds and mosan stones to detect gems.

3. Identify white topaz. Topaz is also a kind of gem that is very similar to diamond and can't be distinguished by naked eyes. However, white topaz is softer than diamonds. The hardness of one mineral can be tested by scraping with another mineral. If a gem can scratch other minerals without affecting itself, then the hardness is stronger. Real diamonds are one of the hardest substances on earth. You can try to hold them in your hand. If scratches are easy to appear, it may be white topaz or other soft substitutes.

4. Identify white sapphires. Unlike people's usual impression, sapphire is not always blue. In fact, this kind of gem has various colors. White sapphire is clear and transparent, and is often used as a substitute for diamonds. If you find that the gem in your hand is hazy or foggy, the contrast between light and shade is not very strong, and it is probably white sapphire.

5. Identify cubic zirconia. Cubic zirconia is a kind of artificial gem, which is very similar to diamond. The simplest identification method is to see if the color of a gem has "fire". Cubic zirconia will show orange light, so it is easy to identify. Because this kind of gem is man-made, it may look clearer than natural diamonds, which often have some tiny flaws. When light passes through, cubic zirconia will also reflect a wider spectral range than real diamonds. The brilliance and reflected light of real diamonds are almost colorless, while the reflected light of cubic zirconia is colored.

A very popular method to identify diamonds is to scrape gems on glass. According to people's general view, if a gem scratches the glass without any damage, it is a diamond. However, high-quality cubic zirconia can also scratch the glass, so this method is not completely reliable.

Method 5: Find evidence to prove that the diamond is real.

1. Find an authoritative diamond appraiser. Most diamond retailers employ their own gem experts and appraisers. However, many consumers still tend to find third-party experts to identify gems. If you are going to buy a diamond, or just want to know whether this one in your hand is true or not, then naturally you want to know exactly whether the appraisal is accurate. There are two main steps in the appraisal: the first step is to determine the kind and quality of gems, and the second step is to evaluate them. When choosing an independent appraiser, it is best to choose someone with a professional background, relevant education, or who has obtained the license of a gemstone appraisal institution. And these people had better not be interested in jewelry stores. In this way, at least the scientific appraisal can be guaranteed.

When you ask others to help you identify diamonds, make sure they are trustworthy people in the community. However, you'd better choose a jeweler to help you identify the diamond face to face.

2. Ask the right questions. A good appraiser can not only identify the authenticity of diamonds, but also answer a series of questions about the quality of gems to ensure that you will not be fooled by jewelers. This is especially important if you plan to buy or inherit diamonds. Gem experts can tell you: Are gems natural or artificial?

Has the color of the gemstone been manually adjusted?

Has the gem been artificially treated, and the result of this treatment is permanent or temporary?

Whether the gem itself conforms to the grade certificate provided by the jeweler.

3. Remember to ask for identification. No matter which appraisal method you choose, it is best to have a gem appraisal book. Talk to your gemologist or appraiser. The certificate can prove that the authenticity of the diamond in your hand has been appraised by experts. If you want to buy a diamond you have never seen before, such as online shopping, the certificate is especially important, so be sure to ask for it. The best way to test the authenticity of diamonds is to let national gem appraisal institutions or GIA and other institutions identify them. If you have it nearby, you can take it directly for identification, or a professional jeweler can pick it up and send it to GIA for identification.

Please check your certificate carefully. Not all certificates have first-class effects. There must be grade certification on the certificate, such as GIA, AGSL, LGP, PGGL, etc. Either the appraiser himself must belong to a professional organization and cannot be employed by a jeweler. The certificate also contains a lot of information about diamonds, such as carat weight, size, proportion, transparency grade, color grade, cut grade and so on.

The certificate may also contain other information: fluorescence rate, that is, the fluorescence of a gem under ultraviolet radiation.

Polishing is the smoothness of the surface.

Symmetry, that is, whether two opposite faces are consistent.

5. Register your gems. Knowing that the gem is real, whether it is identified by a laboratory or an independent appraiser, the diamond should be taken to the laboratory for registration and "fingerprint" registration. This will ensure the ownership of the diamond, and no one can steal the pillar without your knowledge. Like people, every diamond is unique. This new technology allows gemologists to quantify the uniqueness of each diamond and identify the "fingerprint" of the diamond. The grade fee is usually lower than $ 100, which can be used as evidence when insuring the diamond grade. If your diamond is stolen, and the diamond has been registered as a "fingerprint", you can get it back by showing identification certificates and other documents.

Actually, whether it's true or not, it's good to like jewelry. What you're wearing is, is it really that important whether the diamond is real or not? Since experts can be fooled, you don't have to take it too seriously. Just when buying and selling diamonds, it is necessary to find out whether it is true or not, whether it is natural or artificial.

If you want to know exactly, I suggest you find an independent appraiser. But it takes at least 200 to get an independent appraiser to 500 yuan. Don't forget, don't let the diamond out of your sight. Some unscrupulous jewelers may steal pillars.

Warning not to scratch things with diamonds just to identify or show off. Although real diamonds don't leave scratches, you may break them, because they are hard but brittle, so they are not so strong. Sandpaper can be used to identify diamonds, but it is not completely reliable. Even if it is not true, it is possible to pass this test, because many gems are hard. And if it doesn't pass, it's completely unnecessary to destroy a gem that you randomly test just because it's not hard enough.

In fact, there is no way to identify the authenticity of diamonds 100% except the certificate of an authoritative organization. If you want to buy diamonds from pawn shops, markets or even online, then the risks naturally exist.