5 thoughts on “How to identify jade, emerald, what kind of instrument, preferably a jewelry expert to play back and forth”
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When we face a piece of jade or jade, first of all, we must judge what material it is, what jade it is, and whether it is emerald, and then consider whether it has been treated and what is its quality? There are many ways to identify emeralds. In general, these identification methods are summarized nothing more than three categories, with viewing identification, instrument detection and liquid identification.
1. View recognition
must be pointed out that the perception recognition must be based on professional knowledge and practical experience, which is indispensable. The viewing recognition is summarized as "a look, two touch, three, four listening".
In look at the characteristics, see the structure, look at the color, and check the defects -the characteristics of the emerald are "emerald" (commonly known as the flies wings), that is, the internal granular, sheet or fiber Star -like flash caused by spots of spots; the structure of the emerald has the characteristics of changing spots, and there are small fibrous mineral crystals around the translucent granular spots. It is the basis for evaluating the quality of the jadeite geology, and it is also the basis for measuring the emerald grade; the finished jadeite products generally have glass, sub -glass or semi -glass luster, uneven color, and jade and jade, such as jade, and other jade. Oily luster, most of the colors are uniform. Experienced appraisers or merchants can see whether the jade parts are jadeite from the color; with the help of light or natural light, check whether there are impurities, cracks, etc. in the emerald entity, and combine other indicators. It is estimated that it is estimated that The quality of emeralds is good or bad, and the grade level is the purpose of "investigating flaws".
This: Emerald heat transfer, fast heat dissipation, on the face or on the back of the hand, it has a cold feeling in a short time; The surface is smooth, and the sense of slippery when touching the hand is obvious.
掂: The density of the emerald is 3.34 grams/cubic centimeter, which is higher than the nephrite, Dushan Jade, Saitama, Australian jade, Malay jade (staining quartz rock), hard sodium jade and grapes Jade and other. But it is lower than Qinghai Cui (calcium aluminum field), Tsarwa stone (water calcium aluminum field) and so on. Those who have experience can judge whether a piece of jade or jade is emerald through heavy weight.
Listening: Carefully listen to the sound of the finished products, you can roughly distinguish whether the jade parts are emerald and what kind of jadeite (whether it is washed and treated). Naturally, especially the good texture of jadeite jade, it is a pure and pleasant "steel sound" when it competes. Listen, we must have a comparison, or have -based experience as a basis, in order to judge the quality of jade based on the sound quality.
2, instrument detection
The high -tech equipment instruments such as electronic probe, infrared spectrum, and Raman spectrum in the appraisal of jadeite. However, these high -tech instruments (appraisal methods) are used only when encountering complex and difficult problems. In the inspection and appraisal work, we use more conventional instruments. Generally, jewelry inspection and appraisal workers often use the following instruments to identify emerald:
Gewor microscope: The magnification of gemstone microscope is usually 10 to 80 times. It can clearly observe the surface structure and internal tissue characteristics of the emerald. It can be determined whether the measurement is emerald, whether it is natural emerald or the treated emerald (emerald B, C goods). Bad defects can also be observed with the combined surface of the combination stone and so on.
The light -light flashlight and handheld amplifier: In the absence of gemless microscopes or inconvenient to carry microscope, use a concentrated flashlight and handheld amplifier. The condensed flashlight mainly uses transmission or reflex method to observe the transparency, texture, color and defects of jadeite in a magnifying glass. Sometimes with Charles filtering mirror to distinguish, observe whether the detected object is emerald and whether it is a jadeite for dyeing. There are 5 times, 8 times, 10, 15 times, and 20 times the handheld mirror. Among them, it is advisable to use 10 times and 20 times, and the most useful of 10 times. It can not only observe the internal situation of Jewelry and other jewelry And other flaws, and in jewelry trade, involving the defects of jewelry (such as cracks, black spots, plaques, etc.), often based on the results of] 0 times the results of the observation under the large mirror as the basis of quality evaluation, thereby determining its value.
The refraction instrument: Ship instrument is one of the most direct and most effective instruments for identifying the authenticity of jewelry. The refractive index of emerald is 1.650-1.680, and the point test method is 1.65 to 1.67. Usually 1.66. However, it must be pointed out that natural jadeite is the same as the processing of jadeite.
The lighting meter: absorption effect, when the white light passes through the treasure jade, some wavelengths of light waves will be absorbed, and the absorption of the light waves of different treasures is different. Related to the type of color element. Therefore, the spaghetti is the most powerful means to identify the true and false color of the treasure jade. In fact, it is often used to identify authentic emeralds and identify dyeing emeralds.
The gem -grade green jadeite caused by chromium (CR). In the absorption of the spectrum, there are three step -shaped fine suction lines at the 630, 660, and 690nm of Hongguang District; There is an obvious black absorption line at 437nm in Ziguang District; and the artificial dyeing emerald has a dense absorption band near the area near the 650nm of Hongguang District.
The polarizer: Quality collection, which forms minerals of minerals, is single -diaphragm, and the two -axis crystal positive light. Therefore, it does not disappear under the polarizer, that is, all bright.
The proportion of balance: Most is the use of electronic libras with high accuracy. The density of the jadeite method (density method) was used with a static water mechanics (density method) to be 3.34g / cm3 ( 0.06, —0.09). The density is an important indicator that is different from other jade.
The standard hardness meter: 5-7, it can be carved by the hard tip of the crystal (Hardness 7), not the hard -tip of the long stone (hardness 6). As a reference basis for appraisal.
Charles filter: red under the color filter, it is impossible to be natural emerald; but in turn, it is not necessarily true that the non -reddish person is not necessarily true, because some dyed emeralds, coating emeralds and laser are caused Color jadeite and so on
Does the third -generation Charles Filtering Mirror really have such a good effect? Intersection Intersection
Answer: better than the previous two generations. Save time is longer. Basically, it will not be invalid.
A test C (Qin color) is useful. The B product is a waste.
Chelsea Is the color filter the same as the Charles filter? Intersection Intersection Intersection
Answer: The transliteration of Chelsea is the same
If it really has this good effect, where can I buy it? Intersection Intersection Intersection
: Some testing agencies and shops making jewelry weekly equipment.
The answer who has used it ,,,,,, thank you
There are a lot of these messy gadgets, and I just have a flashlight. I bought it when it looks fun.
The effect of the third generation is better than the previous generation, but it is not the same as God. Both of the two filters are similar. At least I did not find any special features. If you buy it, it is directly fixed abroad. Essence Essence
mades, these are not depending on the instrument, use a friend to talk about photography, third -rate photographers are compared with equipment, second -rate photographers are more technical, first -class photographers are more ideological than ideological than ideology.
Hello! I am making emeralds. The color filter is indeed unique, but few people now use that, because sometimes there are deviations, not particularly accurate. If you want to buy There are. But if you just have something to identify, it is recommended that you take a professional jewelry appraisal agency. He will give you an authoritative certification. If you want to learn to play, it will be difficult. It is easy to get in. If you do n’t have more than ten years of time, it is difficult to have any deep understanding of the jadeite. After answering! If you do n’t understand, you can leave a message to me!
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