Introduction of common gemstone identification instruments

Love jade and jade, you must first understand Jianyu, otherwise, in today's more sophisticated technology, you are likely to "lost the wife and the soldiers." Folk identification of jade and true and false, the most commonly used method is the identification of water droplets (a drop of water on the jade, such as the dew-like long-lost true jade, the water droplets quickly disappeared is a fake), touch method (if it is true jade) Hand touch the feeling of cold lubrication), inspection method (put the jade to the light, such as the sun, the light, if the color is clear, the color is evenly distributed is true jade) and the tongue method (the tongue tip is really jade, and the fake jade There is no sense of guilt. In the end, there should be a magnifying glass to watch, mainly whether there are cracks, no cracks are superior quality jade, followed by others, the more cracks, the lower the value).

Of course, these are only the initial level identification of ordinary jade lovers. For jade collectors, in addition to rich experience, we must use professional equipment to discover a story and study the true history of a jade.

As can be seen from the above, the magnifying glass is indispensable. It can be used to observe the surface features and internal features of jade. By observing the port, cleavage, cracking, processing quality, polishing process, etc., the initial value of jade is judged. . "Jade is not awkward, not a device." After you evaluate the true and false of a jade, you must look at its quality, the quality of the process, the scarcity, etc. may affect its market valuation.

The use of balance to measure density is also a must in all jade identification. We know that different substances have different densities. The structure and composition of different jade are different, and they are self-exposed in their density. Therefore, the status of density determination is quite important.

Polarized light microscopes are also an inevitable choice. We know that the main structures of different kinds of jade are also different. The method of microscopic examination of ordinary light by polarized light microscopy is used to identify the refraction of jade, and the jade varieties and impurities contained therein can be well judged. Of course, in order to obtain a more accurate judgment, it is preferable to use a monochromatic light source when using a polarizing microscope.

Each jade has a corresponding refractive index. The refractive index is measured by a refractometer, and there are two methods of facet and facet measurement, and Saitama and Dushan jade are often completed by spot measurement.

The electron probe can analyze the chemical composition of the mineral microdomains in the flakes, and is naturally a good helper in the identification of jade. The highly focused electron beam is focused on the minerals to excite the characteristic X-rays that make up the mineral elements. As we guide, jade is a kind of mineral. The wavelength of fluorescent X-rays is measured by a beam splitter or a detector, and the intensity is compared with a standard sample, or the component content is directly counted according to different intensity corrections. This process does not damage the sample and has high measurement accuracy. Therefore, the electron probe is widely used in archaeological and gem identification work.

At present, in the field of jade, the industry has accumulated a large number of infrared spectrum maps. Therefore, the use of infrared absorption spectrometers for the determination of samples, and then compared with the existing data for confirmation, is a common identification method used by many jewelry identification institutes. It has a wide application, no restrictions on the detection of sample phase, fast speed, no damage, and is very popular in the market. However, we can not ignore it, its accuracy and sensitivity are lower than the visible, ultraviolet absorption spectrophotometry.

Of course, many general gem identification instruments can be used for jade identification, but we advocate "specialization in the industry". The particularity of universality should be the focus of everyone's attention in jade identification work, so if you want As a jade collector, there are still a lot of homework to be filled.

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