How to identify true and false rubies?

Question 1: How to distinguish between true and false rubies? The difference between natural ruby and synthetic ruby is 1. There are many ways to synthesize ruby by inclusion method, mainly including flame melting method, flux method and hydrothermal method. Ruby synthesized by different methods has different inclusions, which need to be distinguished in professional laboratories. We only need to identify whether they are natural or synthetic, and we don't need to find a synthetic method. Synthetic rubies are also characterized by bright colors. And it is relatively uniform, and it is difficult for the naked eye to find the inclusions. But most natural rubies in the market have more or less obvious so-called cotton veins, that is, the combination of inclusions and internal cracks distributed in a certain direction (controlled by the internal structure of the crystal), and sometimes spun silk inclusions can be seen. 2. Fluorescence method can be used to distinguish natural rubies with obvious inclusions from synthetic rubies. Natural ruby and synthetic ruby both emit red fluorescence under long-wave ultraviolet lamp, but synthetic ruby is brighter and brighter. Natural rubies are "ten Hong Jiu cracks", and natural rubies without any flaws and cracks are extremely rare. Artificial rubies have the same color, few internal defects or crystal inclusions, and are clean and large. As a precious gem, natural rubies over 3 carats are very rare in the market. If you encounter a big ruby, you should pay attention, because the value of natural ruby is thousands of times higher than that of artificial ruby. A little carelessness will "take medicine." Natural ruby has a strong "dichroism". The so-called dichroism means that there are two colors of red and orange red from different directions. If there is only one color, it may be red spinel, garnet or red glass. Red spinel and natural ruby are very similar, and they are most easily confused, so be very careful. Ruby is one of the precious varieties in jewelry. Ruby is bright in color, and under the illumination of light source, it can reflect beautiful and moving six-ray starlight, commonly known as six lines, which is caused by the special crystal structure of ruby and its unique optical phenomenon. Ruby is transparent, translucent and opaque, and its colors are water red, pink, pigeon blood red and rose red. Natural ruby crystal is hexagonal or hexagonal bipyramid, so its color is generally cobweb concentric hexagon. "∧" or "-"shape may also appear after cutting. Put the gem into clear water, and its above color and shape will be clearly displayed. Ruby has a specific gravity of 3.99~4.02 and a hardness of 9. Ruby with large particles, pure texture, no cotton and no frills is very precious and rare. In this respect, rubies with large particles are usually fake. There are two kinds of fake rubies: the first is to pass off low-grade rubies as rubies, such as big rubies, ruby, garnet and so on. The way to distinguish between true and false rubies is to observe their colors. The red color of ruby is brilliant red, bright and dazzling, the red color of big ruby is deep red, the red color of ruby is pink, and the red color of garnet is purplish red. Moreover, all fake rubies do not have the unique color, shape and luster of rubies. The second is to be a ruby. Artificial ruby is very similar to natural ruby in terms of specific gravity, hardness and color. The method of identification is to put gems into water. The color of natural gems is "∧" or "-"or concentric hexagon, while the color of artificial rubies is cylinder or concentric circle. Intuitively, artificial rubies have uniform texture, no natural impurities, even and positive color, often large particles and lack naturalness. The synthesized ruby is uniform in color, with few internal defects, clean and large, with occasional arc growth lines; There are few inclusions in synthetic rubies, and occasionally a single round, teardrop-shaped bubble can be seen. The fluorescence of synthetic ruby is stronger than that of natural ruby, and it is transparent red under ultraviolet lamp. Natural ruby and synthetic ruby are processed in different directions in gemstone raw materials, so the display direction of dichroism is also different. Synthetic faceted rubies show dichroism in the table direction of gemstones, while natural faceted rubies only show dichroism when observed in the waist direction. The difference between ruby and red glass. Red glass is uniform in color, non-dichromatic, and contains only circular bubbles. In the fake glass gem, the linear flow structure of concentrated sugar when it is dissolved in water can be seen. The fakes of glass gems are all products cast by molten glass, and there are traces of casting on the surface. Ruby is one of the precious varieties in jewelry. Ruby is bright in color, and under the illumination of light source, it can reflect beautiful and moving six-ray starlight, commonly known as six lines, which is caused by the special crystal structure of ruby and its unique optical phenomenon. Ruby is transparent, translucent and opaque, and its colors are aqua red, pink, pigeon blood red and rose red ... >>.

Question 2: How to distinguish between true and false rubies is easy to distinguish. With the present scientific and technological means, the treatment of precious stones has reached the point where human beings can't simply distinguish them with the naked eye. For example, coloring with real rubies is generally invisible to the naked eye. Even with a magnifying glass, it needs a very professional practitioner to identify it. There are mistakes, so let the people who come here do the professional things. It is wisest to go to a regular testing institution for re-inspection.

Question 3: How to tell the true and false rubies 1? Observation of color: Due to the harsh natural growth environment, natural rubies are often uneven in color, and soft, linear, banded or hexagonal growth zones can be seen inside; However, the synthesized ruby is extremely pure in color, high in saturation and unnatural in color.

2. Observe the luster: Gemstones have several different luster, while rubies generally have glass luster or strong glass luster. When we pick up a ruby, we can observe whether it is glass or strong glass luster, especially under strong light irradiation, the color will become more vivid and bright, with a unique silky flash in part or whole, and the luster is quite strong.

3. Observe dichroism: Natural rubies often have obvious dichroism, and the method of observing dichroism is also very simple. We picked up the gem and observed its color from different directions. Ruby can see the change of red, orange and red, and other imitations do not have this characteristic.

4. Observe rubies with cat's eye or starlight effect: Natural rubies with special optical effects are special rubies. When observing it, observe its eyeliner or star line. The lines of natural rubies are emitted from the depths, and the starlight is divergent and irregular, with bright spots in the middle; Synthetic ruby has lines floating on the surface, which are clear and obvious, with regular star lines and bright spots in the middle.

5. Observation and cutting: We generally observe that the processing of high-quality natural rubies and sapphires is very meticulous, and they are carefully polished during the processing, but the curved bottom surface is not polished; The processing of artificial rubies and sapphires is generally rough, with grinding marks and trembling marks-fire marks caused by rapid grinding, and the curved bottom surface is often polished.

Question 4: How to identify true and false gems? Because jewelry is expensive and easy to imitate, it is also the easiest to confuse the real with the fake. It takes a long time to accumulate experience to classify fake gems accurately. Because without certain experience, it is difficult to identify just by looking and touching. To distinguish between true and false gems, we must first know something about gems, especially the characteristics of some common gems, such as diamonds, pearls, emeralds, rubies, emeralds and sapphires. Because these gems often have fakes, only with this knowledge can we carry out the practice of identifying gems. In the past, there were many folk methods to identify the authenticity of gems, such as throwing stones to see if they slipped; Use your tongue to test the warmth and coldness of materials; Breathe on the surface of the material, etc. All these methods have certain merits, but with the progress of science and technology, some fakes have reached the point of confusing the real with the fake, and it is difficult to identify them by relying solely on these indigenous methods. If you want to simply identify the authenticity of a gem, you can use this method: carve it on the identified material with glass. If there is no mark or the mark is shallow, it means that it has a certain hardness; From the point of view of weight, if an object is heavy, then it conforms to two basic characteristics of a gem, namely firmness and weight. The next step is to observe the color and internal texture of the material. It is normal that the color is a little defective, and it is normal to have bubbles or defects, which conforms to the other two basic characteristics of gems, namely, color cast and defects. Of course, this is different. Although there are fewer top gems, they still exist. If you encounter this kind of gem, you'd better invite experts or use modern instruments to identify it. Now, let's introduce some methods to identify pearls. The identification method of pearls can start with color, transparency, surface texture and shape. The color of fake goods is relatively single, and there is little special fluorescence like pearls, and the color of pearls is slightly dark; The transparency of fake goods is better, but pearls are worse; The surface lines of fakes are consistent and unnatural, while the surface lines of pearls are different in depth and even point-shaped, mostly natural; As for the shape, most fakes are round and symmetrical, while pearls are irregular and obviously asymmetrical. The method of gem identification is 1. Refractometer can measure the refractive index and birefringence of gemstones. In the process of gem detection, refractive index and birefringence are two very important optical constants, which are the main basis for identifying gems. 2. Polarizer The main purpose of polarizer is to judge the optical properties of gemstone materials according to the different phenomena of gemstones under polarizer. In addition, adding a lens or a glass interference ball to the polarizer can be used to observe the interference pattern of anisotropic gemstones, thus determining the coaxiality of gemstones. 3. The dichroic mirror has some colored gems. Under the irradiation of transmitted light, they will appear in different colors or shades of the same color from different directions. This polychromatic phenomenon of gemstones can be observed with a dichroic mirror. Polychromaticity is also an important feature of colored anisotropic gemstones. 4. Spectrometer Many gemstones are colored because they contain some chromogenic elements, all of which have their own absorption characteristics. These absorption spectra of Shi Bao can be observed by spectroscope, especially for gems with typical absorption spectra, the detection results of spectroscope can be used as an important identification basis. 5. Color filter Color filter is characterized by simple structure, compact instrument, easy to carry, and can observe multiple samples at the same time, thus quickly identifying. The earliest and most commonly used Charles filter. Used to detect similar green and blue gems and identify their imitations. 6. There are two main kinds of ultraviolet lamp gems: fluorescence and phosphorescence. The difference of luminescence of different gems can also be used as an auxiliary detection means to identify gems. The fluorescence and phosphorescence characteristics of gemstones can be observed by ultraviolet lamp.

Satisfied, please adopt.

Question 5: How to tell the authenticity of a gem? There are several ways to distinguish imitation gems. 1. Imitation of glass: It can be inspected by its moist hand feel, low hardness and easy wear and crack. In addition, glass is a single refractive object (most gems have birefringence). 2. Composite gemstone: It is made by mixing more than one kind of gemstone. Sticking natural stone pieces to stained glass can check the seam between the two layers. Third, heat treatment: heating can increase the color or transparency of gemstones. But this method has obvious effect on some gems, but not on others. Radiation: Gemstones may change color if exposed to radiation. It takes millions of years for natural radiation to take effect, and only a few hours for labor. Fifth, dyeing. Sixth, soak in oil. 7. Synthetic gems: They are made in laboratories or processing plants, not from rocks. Need more professional instruments to identify.

Question 6: The simplest way to distinguish between true and false rubies. Natural rubies have a strong "dichroism". The so-called dichroism means that from different directions, there are two shades of red and orange. If there is only one color, it may be red spinel, garnet or red glass. It is particularly important to note that red spinel and natural ruby are very similar, and they are the most easily confused, so we must be very careful. Let's first look at the difference between them and natural rubies.

The color of red spinel is very similar to ruby, but the red color of red spinel is relatively uniform, and no red spots or color groups can be seen. Seen from different directions, it has no dichroism. Fluorescence is weaker than ruby. When illuminated from the top with a flashlight in the dark, it becomes bright, but the edge or facet of the pavilion can be seen. The interior is relatively clean and clear, and there are no filiform rutile inclusions or bands with an angle of 60 degrees and 120 degrees in the ruby.

Question 7: How to tell whether a gem is genuine or not? Gems include diamonds, luminous pearls, opals, jadeite, rubies and sapphires. That's expensive and artificial gem's value. Although beautifully made, they are all fake. Generally speaking, fake gems can be divided into four categories, namely, plastic and glass imitations; The second is to combine imitations similar to precious stones; 3 fake diamonds and compounds (such as alumina); The fourth is to add minerals with transparent pigments and pretend to be gems. Here are some understandings.

Appearance: the lines of real gems are clear and natural, with cloud and crystal characteristics; Fake gems have no natural lines, clouds and crystals.

Second, heat: heat slowly becomes a real gem, which is hot and has a cold sense of tactile test; The feeling of contact with heat after the fake gem dissipates heat quickly.

3. Observation with a magnifying glass: The surface of the fake gem is arc-shaped, with obvious signs of internal spiral streamline, round or oval bubbles, crack casting and so on. But real gems don't have this phenomenon.

Hardness: 10 degree, ruby and sapphire are 9 degrees, and the hardness of gemstones is low. Without affecting the beauty of the website, look at the diamond lottery of the stone, if you can leave scratches on the real diamond; You can also look at topaz gems as a reference (hardness 8), if you leave traces of real gems.

Five colors: red, blue, green, orange, purple, yellow and so on. Such as ruby, pigeon blood red is the best, natural gemstones are seen with a magnifying glass, and there are also inclusions and cracks; And artificial gem is particularly pure, with no impurities, no bubbles and no traces of "doing".

6. Multicolor: How to really color a gem? Such as a side view of the sun overlooking sapphire blue and blue-green; Fake gems do not have this function.

Seven, fire roasting: real gems will not be roasted; In the case of baking fake gems, when the temperature rises to 90 degrees Celsius, it will break, which may be because of fake.

Question 8: How to distinguish a rock crystal from a semi-precious stone in Taobao does not mean that it is fake. This is the viewpoint of jewelry taxonomy. Crystals are generally classified as semi-precious stones. Gems generally include diamonds, rubies, sapphires and emeralds. Semi-precious stones refer to amethyst, topaz, garnet, tourmaline, topaz, prehnite, titanium crystal, fluorite, etc. It's all natural. Generally, very high value is in gem series, and slightly lower value is in semi-precious stone series.

What you said is natural. But whether the real thing is genuine or not needs to be screened.

Synthetic is another matter.

If it helps you, please accept it as a feeling.