How to judge whether the jewelry appraisal certificate is true or false?

Pay content for time limit to check for freenAnswer 1. Look at transparency. The transparency can be used to understand the advantages and disadvantages of gems. Generally speaking, the higher the transparency, the more precious the transparency. The transparency can also be used to distinguish between gems with similar colors but different types. For example, spinels are similar to purple tooth Wu in color, but spinels are transparent, and some purple tooth Wu is opaque or translucent. The same is true of yellow gems and sapphires. Yellow Heman is a transparent crystal, while sapphire is distinguished by transparent, translucent to opaque. Olives are transparent crystals, but some varieties are opaque. 2. Look at gloss, the gloss of the gem is an important basis for the naked eye appraisal, which can roughly judge a satisfactory refraction range. The luster is determined by the level of refractive index and the degree of polishing surface. The stronger the luster of the gem, the higher the refractive index. The refractive index of the semi -diamond gloss gemstone falls on the high refractive index range on the scale of the refractor. The refractive index of gloss is a lower range. The waxy, glossy oil -luster jade polishing surface is poor, and the silk shiny indicates that there are many needle -shaped wraps in the gemstone. Amber with resin luster may be amber. It is carved into a curved type, translucent, cloudy, and the sky blue milky luster is ice long moonstone. The pearl luster is sodium long moonstone, and the blue gloss of yellow -brown luster is a long moonstone. The dazzling dazzling light in the sun is litstone. Diamonds have a typical diamond luster. 3. Observe the parcel and use 10 times large mirror to observe the characteristics of the parcel in the transparent gemstone, which is the most reliable way to distinguish between natural and artificial products. The package of natural gems can be solid, liquid, and gas, and the solids are mostly crystal; mostly artificial gems have air bubbles, and rotor -shaped solid parcels are mixed objects for synthetic gems. 4. Look at the fracture and explanation, what kind of luster on the surface and the surface of the fracture is particularly important for identifying some gems. Most of the gems with glass luster are shell -shaped fractures, and the translucent and opaque jade are mostly granular and different. For example, the fracture of the coral is no light and different outlets; the fracture of amber is resin luster, shell -shaped fracture; the broken parts of the chalcedony and agate are resin luster and shell -shaped fracture; green pine is dark oil luster, granular or shell -shaped fracture; The dense jade and Dongling stone are granular and different. 5. Look at the dual refraction and observation methods. Only the non -average gemstone can have dual refractive phenomena. Whether the dual refractive phenomenon is obvious or not depends on the size of the dual refractive index, that is, the difference between the maximum refractive index value and the minimum refractive index. Dual refractive index is an important optical nature of identifying gems. Double refractive gemstones can generally observe the dual shadow of the bottom with the naked eye or magnifying glass, and use it as one of the basis for identifying the non -homogeneous gemstone. 6. Look at color scattered. In the transparent turning gemstone, the color scattered strength can provide important clues for identification. Only diamonds, artificial cubic oxidation, vermiculite, golden redstone, emeranex, tinstone, etc. can see obvious scattering with the naked eye. When color is a phenomenon that the white light is decomposed into its spectral color (red, orange, yellow, green, green, blue, and purple). Each gem has its own colors, but the colornThe size of the scattered degree is different, and the color and clearness of the decomposition are different. The completeness of the spectral color of the gemstone is directly proportional to the height of the gem color dispersing. That is, the gem with high color dispersal can observe the more complete spectral color, and vice versa. In addition, the color scattered gemstone will affect the clearness of the scattered color. Generally, the color of the gemstone with a pale or colorless gemstone is obvious, and the colorful gem color of the color is not obvious due to the cover of the body color. Essence 7. Looking at the discoloration effect, the discoloration effect refers to some chromium or cricket variety. Under the irradiation of different light sources, the gemstone shows different colors. For example, chromium -containing golden emeralds are green in sunlight and red under incandescent lamps, so it is also called a stone change. Gem (including artificial gemstones) with discoloration effects are mainly: stones, color -changing sapphire, color -changing spinels, artificial color -changing sapphires, artificial color -changing aluminum g uccillary, and artificial discoloration cubic oxidation. 8. Look at the poly -colored, and the multi -color is closely related to the double refraction. It refers to some colored gems with double refraction. Observation in different directions will show different colors. If the more accurate description is observed in the three -dimensional light shaft direction of the crystal) from three directions (up, down, left and right, front and back, and two hue or the same hue is different, it is called dual -color; if from the three directions Observation, three hue or depths are presented, called triple color. Colored gems, which are generally refracted, are multi -color, but they are significantly different. Therefore, the characteristics of multi -color and obvious gemstones can be used as one of the important identification basis. For example, blue sapphires are very similar to blue 堇 例, but the multi -color differences between the two are obvious: blue sapphire has blue and blue -green binsea, which is not much different from the body color of the gem itself; and blue is blue; and blue is blue; and blue The green stone has three colors of purple and blue, blue and pale yellow, which has changed greatly compared to the gem itself. 9. Looking at the red flash effect, the red flash effect refers to blue or green gems containing chromium, pheasant or cobalt. When lighting in the dark in the dark, in the blue or green body color Phenomenon. The red flash effect is rare, and it is one of the effective ways to identify certain natural gems and synthetic gems. There are not many gems with a red flash effect. Except for the two -combined stone with magnesium and aluminum gadgets as the top and red glass as the bottom, the red circle can be seen at the waist circumference; Stone and synthetic emerald. 10. Looking at the cat's eye effect, the cat's eye effect refers to the curved gemstone. Under the light, the surface presents a parallel movement of light zone. The cat's eye effect is because the gems contain dense parallel arranged fibrous or tubular parcels. When the gem parallel fiber or tube -shaped parcel is cut and picked it into a curved gemstone, the light is illuminated to the parallel arranged parcel, a tiny parcel wrap There is a reflective point in the body. These reflective points are connected to show a light band, which produces cat eye effects.