1 thought on “Find the papers in gemstones (identification, evaluation or main study of a gem)”

  1. The gem is natural and artificial. How to distinguish between natural and artificial gems? For example, diamonds, natural and artificial diamonds are the same in composition, hardness, and proportion, and the identification is difficult. But with the help of the X -ray instrument, it can be different: artificial diamond hair yellow fluorescence and phosphorus light, while natural diamond hair blue and fluorescence. The chemical composition of diamonds is carbon.

    The red sapphire can also be different. It is generally believed that ruby ​​and sapphire are precious gems second only to diamonds and one of the most important gem types. From the perspective of mineral science, they are all minerals of Jade Crystals, but they are just different in color. The so -called ruby ​​refers to the red coriander with the quality of ruby; the meaning of sapphire is relatively wide, which includes a rigida with any color with the quality of gem quality except red.

    The real red jewels belong to the three -party crystal system. The chemical composition is the same as the three aluminum aluminum, which is the same as the chemical component of Gangyu. If other chemical components are displayed, of course, it is not Gangyu. The surface of natural red sapphire can form large and small pits on the surface during growth, and this phenomenon is not as good as artificially, but there can be layers of "arc -shaped growth lines". The line -like structure can be concluded that this is not a real gem. In addition, natural red and sapphires have some other natural mineral crystals around the crystallization process. These minerals are often wrapped in red and sapphire crystals to become bags. These bags have two major characteristics: one is the crystal with edges; the other is often arranged in a certain direction and intersecting each other in 60 °. When watching the naked eye, it seems that there are many filaments on the surface of red and sauggals. This is precisely an important symbol of real gemstones.

    In contrast, bodies can also appear in artificial red and sapphires. Its bag body is not a variety of minerals, but bubbles. Essence

    The analysis in the interior can be used to identify natural and artificial red and sapphires through a spectrometer. Professional and technical personnel believe that the blue part of the natural red and sapphire in the spectrum in the spectrum can be seen with a black line with a wavelength of 450mm. This must be really natural red and sapphire. Without this absorbing black line, it must be fake goods -artificial red and sapphire. "Jewelry Jewelry" [Other] How to identify gemstones (reprinted)

    Ant orange flavor-Submission Date: 2006-3-7 16:23:04

    The current jewelry jewelry There are many types of jewelry sold in the market, and some of them are common to make high profits in order to make high profits. Therefore, in order to safeguard the interests of consumers, it is necessary to pointed out some problems in the jewelry market to the majority of consumers, and introduce the relatively practical and simple appraisal methods of jewelry according to national standards.

    The appraisal of diamonds
    diamonds are noble and luxurious accessories. At present, the phenomenon of cheap gems, artificial gems and even glass is common in the market. The following types:
    ● Shirshite: It is very similar to the diamond, and it is the best counterfeit supplies for diamonds. The appraisal method is: Due to the polarization and large double refractive index, when the vermiculite is observed by 10 times the large mirror observation, the surface of the stone is observed, and it can be seen from its top surface. Shadow, and diamonds have no phenomenon.
    ● Glass: The refractive index of the glass is very low. There is no flashing color light of diamonds, especially sinking into the water.
    ● Cube oxidation: It is an artificial compound. It is very close to natural diamonds in terms of color scattered and refractive indexes, and it also has the seductive appearance of "fire", but its hardness is low (8.5) It can be distinguished from each other. And thermal conductivity is much lower than that of diamonds, and it can also be identified by heat guidelines to accurately distinguish them.
    ● Crystal: Although it is a natural mineral transparent crystal, after processing is like diamonds, it lacks the colorful light of diamonds. Diamond itself: Diamonds are the hardest of natural substances. Mo's hardness is 10. Diamonds can be engraved with any other gemstone, but any other gems can be scratched by diamonds. Diamonds have a strong fire color, and it can be seen on the surface. Diamonds are close to oil. If you draw a line on the surface of the diamond with oily pen, it becomes a continuous straight line, while other gems are intermittently intermittent. It can also be observed with 10 times large mirror. Most diamonds can see flaws, such as various colored, colorless parcels, cracks, etc. It is best to distinguish diamonds and imitation products through the test of thermal guide. Diamonds can make the heat guide instrument tweet due to strong thermal conductivity, while other gems cannot.
    ● Relief of Ruby: Natural gems "ten red nine cracks", natural rubies with no flaws and cracks are extremely rare. The artificially synthesized ruby ​​color is the same, with less internal defects or crystalline wraps, clean, and large blocks. Natural ruby ​​has strong duality, and there are two different hue from different angles with dual -color mirrors, such as red and orange -red. If there is a hue, it may be red spinel, garnet or red glass.
    ● Sapphire identification: The color of natural sapphire is often uneven, and most of them have straight growth patterns. Artificially synthesized sapphire is the same color, and its growth lines are arc -shaped bands. Often, there are bread dandruff or beaded bubbles in the body. Natural sapphire also has obvious duality, which is blue and blue -green, and the color of other gems is different from natural sapphire, which can be distinguished. In addition, the easiest method can be measured by hardness. Natural sapphire can be carved on the yellow jade, and other blue gems are difficult to scratch marks on the yellow jade. Therefore, sometimes without other instruments, if you carry a piece of yellow jade with you, you can solve some problems.
    ● Cat's eye appraisal: In recent years, there is a glass cat eye ring sales in the market, which makes people true and false. The light band, and there is only one real cat eye; the fake cat eye eyeline is rigid, and the real cat eye eyeline is flexible; the color of the fake cat eyes is diverse, with bright colors such as red, blue, and green. The color of the real cat eye is mostly brownish yellow or light green. Tourmaline's identification tourmaline is a medium -grade gem, but because of peach red and bright blue tourmaline is more valuable, there are also imitations. There are two common categories: one is the colorless tourmaline artificial color; the other is processed by red glass. The method of identification is that true tourmaline often has obvious duality. It can be seen that the double shadow can be seen in the body. The tube -shaped parcel or cotton wool is visible. These characteristics are not possessing by imitation.
    ● Crystal's identification
    In look: Natural crystal always contains some impurities during the formation process. When observing the sun, you can see a slight uniform and slightly horizontal or willow -like substance. The fake crystals are mostly melted with the residual crystals and glass 碴, which are made of polishing and imitation of color. There are no uniform stripes and catkins.
    Tongue licking: Even in the hot summer, licking the surface of the natural crystal with the tongue, there is a cold and cool feeling, and there is no false crystal.
    The light: Natural crystal is placed in the sun. From the perspective of which angle, it can release beautiful glory, and false crystals cannot.
    The hardness of the natural crystal is 7. It will not leave traces on the jewelry with gravel, and there will be no trace.
    In a polarized mirror inspection: Rotate 360 ​​° under polarizing mirror. There are natural crystals that have changed the four dark and four darkness. There is no change.
    Therefore, based on the above -mentioned problems that appear in the jewelry market, consumers should try to choose a reputable merchant when buying jewelry, see more about it, and ask for the identification certificate with the jewelry. Jewelry quality can have a basic guarantee.

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