For a long time, synthetic diamonds or because of the small size or because of the high cost, has not been of commercial value, the identification of synthetic replica Cartier jewelrydiamonds for people to ignore. Since the 90’s, with the continuous improvement and improvement of synthetic technology, synthetic diamonds and artificial processing of synthetic diamonds have become a commercial fact. This gives the identification of diamonds and put forward new issues and challenges. Synthetic diamonds are formed at high growth under high pressure, which is different Cartier love bracelet replica from natural diamonds. Therefore, there are differences between natural and diamonds in some gemological characteristics, which is the basis for the identification of synthetic diamonds. From the current research results, the distinction between natural diamonds and synthetic diamonds identification mainly in the following areas: First, the color The color of synthetic diamonds can be near colorless one yellowish yellow-blue, which contains almost all the natural diamonds. But carefully observe the color of the emblem changes, but also get some useful basis for identification. Most of the synthetic yellow diamonds are highly saturated than the Imitation Trinity de Cartier Braceletnatural yellow diamonds with bright colors and with brown while natural yellow diamonds are soft and pure. Nearly colorless synthetic diamonds always with light gray, light blue, emblem yellowish, yellowish green tones. While the natural nearly colorless diamonds are always with yellow and brown tones. Natural yellow diamonds after irradiation annealing treatment mostly orange, brown, yellow. The synthesis of yellow diamonds after irradiation annealing treatment becomes more red, red, and even red. Synthetic blue diamonds are also more bright than natural blue diamonds, and natural blue diamonds are bright and bright. Second, the crystal form Natural diamond crystal often octahedron, diamond-shaped dodecahedron or irregular (especially blue diamond) shape. As the erosion of the crystal face, the product edge bending, was rounded appearance and crystal surface often associated with the growth structure of the triangle, quadrilateral, grid, cone Knockoff Van Cleef Perlee Braceletand other erosion. Synthetic diamond crystal form of basic cube (cuboid octahedral), can always find the natural diamonds rarely appear in the cubic surface, and the product surface straight, crystal edge steep, crystal sharp angle. The crystal face has a dendritic, irregular pattern that is completely different from the natural diamond crystal surface. Third, the internal characteristics (A) inclusions Under the gem microscope, carefully observe the diamonds inside the inclusions, and sometimes can accurately and quickly identify the natural diamonds and synthetic diamonds. If diamonds can be seen in some transparent colored or colorless mineral inclusions, such as garnet, diopside, enstatite or diamonds, etc. are marked as natural diamonds. If there are some opaque in the interior, only metallic luster under the reflected light, the appearance of the sheet, needle, all kinds of irregular or large and four and show the magnetic metal inclusions impurities, or features Similar to the size of the sticks of the metal inclusions group is the characteristics of synthetic diamonds. These metal inclusions are chemically analyzed as metallic nickel and a small amount of iron. In addition, there are dust inside the synthetic diamond-like grain, black inclusions and so on. (B) the growth structure If the diamonds are of high clarity, it is difficult to see the inclusions, the systematic inspection of the diamond’s internal growth structure also helps to distinguish between natural diamonds and synthetic diamonds. Natural diamonds only appear in octahedral internal growth bands, and there are parallel octahedral flat or crossed textures. Very rare to see. ‘Cloudy’ cube growth zone, the formation of flower center flower pattern, while the synthetic diamond can be cube, octahedron, diamond dodecahedron, tetrahedron and other internal growth zone, its characteristics can be through the The banding of the outer fluorescence and the cathodoluminescence shows that the texture is irregularly alternating or octagonal and cube-related “sand clock” patterns and quadrilateral textures. (C) color zoning The characteristics of the ribbon distribution are also useful evidence for the identification of natural Cartier love ring replica colored diamonds and synthetic diamonds. If observed under the conditions of scattered lighting, most of the natural yellow diamonds and blue diamonds are evenly distributed in color distribution. Sometimes the parallel distribution or patchy ribbon is visible, and the color distribution of most synthetic diamonds is not uniform. Synthetic near colorless diamonds sometimes show very light gray, yellow or green color distribution. Synthetic yellow diamonds and blue diamonds often show “sand clock” patterns or other geometric shapes, such as quadrilateral, octagonal, cylindrical and other ribbons. Ribbon or blurred or clear, showing from deep to shallow color areas. Four, ultraviolet light UV fluorescence is very effective in distinguishing between natural diamonds and synthetic diamonds, and they differ not only in color but also in the distribution of colors. Natural diamonds in the long ultraviolet light under the more common blue fluorescence, while in the short ultraviolet light or no weak blue, yellow fluorescence and fluorescent effect was uniform or uneven band distribution. And synthetic diamonds in the ultraviolet radiation showed abnormal behavior. Synthetic diamonds are yellowish green fluorescence in long and imitation Van Cleef Butterfly Earringsshort ultraviolet radiation, and the fluorescence intensity of short ultraviolet rays is stronger than that of long ultraviolet light. The fluorescence distribution is in the form of a cross, a square or other geometry. In the central part of the fluorescence intensity, gradually weakened to the outer edge, can reflect the obvious characteristics of the internal growth zone. Five, cathode light Diamond in the electron beam irradiation under the intensity of light, the distribution of the characteristics of a certain difference. Diamonds in their complex growth process, the impurity of people carrying nitrogen is the main cause of light due to home. The home address and distribution of the state in the cathode light on the performance of the color, intensity, distribution differences. Which can be obtained by a special pattern called Diamond “Fingerprint”. Due to the significant differences in the growth environment and growth time of natural diamonds and synthetic diamonds, they reflect the obvious differences in the cathode luminescence patterns. The synthetic diamonds are simple in shape, consisting essentially of tetragonal or other geometries (with cubic octahedron Shaped) different ring can be issued in different colors of fluorescence. While natural diamonds show complex patterns or cross hatching made up of curves and lines. 6, spectral examination So far, most gem-class synthetic diamonds are yellow, revealing yellow. So it is necessary to perform a spectral check using a hand-held spectroscope and a desktop spectroscope. “The Cape of Good Hope series of diamonds” (white, a light yellow series), whether natural or natural, with synthetic diamonds with synthetic diamonds. There are obvious absorption lines in natural visible crystals at 415 nm, 452 nm and 478 nm. If there is a yellowish diamond in the 415 nm line, the absorption characteristics of natural diamonds. The natural diamonds treated by irradiation annealing often show 496 nm, 503 nm, 594 nm, 673 nm lines. But the lack of 415 nm line can not explain the synthetic diamonds, but also according to other features to further prove. Some synthetic diamonds produce 470 nm-700 nm wide band in the visible range spectrum. This may be due to the formation of synthetic diamonds when used in the solvent-assisted nickel (ND-induced Cartier nail bracelet replica spectral characteristics.) Most synthetic diamonds, however, have a characteristic absorption peak at 415 nm in the visible light, but at low nitrogen State, there may be 658 nn, the suction peak .500 nm below the full absorption. Seven, magnetic inspection Synthetic diamonds often contain metal inclusions, these inclusions are large or small, and sometimes the naked eye can be observed. Metal inclusions are magnetic, can be strong magnetic material (magnet) to attract. In the inspection process, the diamond system in a silk, stalled air, with the magnet close, and then swing the magnet, synthetic diamond with the magnet parallel to the swing, while the natural diamond is no response.