Tourmaline is a kind of tourmaline. Many people like to put it in the house to play a decorative role, or to ward off evil spirits in the town house. This not only reflects the humanistic atmosphere of the owner, but also enhances the feelings and wins good luck. There are a lot of fake tourmalines on the market today, which confuse people's sights and make people feel uncomfortable. Next, the small series of China Jewelry Merchants Network will teach you how to identify the true and false of the tourmalines. Let's take a look.
1. A tourmaline has a different thermodynamic property than a similar gem. When the tourmaline is heated, rubbed or irradiated by the sun, its surface will carry a charge. These charges are attracted to the opposite charge in the air, and can absorb the dust and paper scraps in the air with opposite charges. Some characteristics. You can do simple tests in this way.
2, red tourmaline is mainly mixed with pink topaz, red spinel, andalusite, which can be identified by heavy liquid method. Use a bottle of 3.06S/cm3 heavy liquid to simultaneously release the red tourmaline in the heavy liquid to suspend or slowly sink, while the red topaz and red spinel sink quickly, and the ruby ​​sinking speed is also greater than the red tourmaline. So you can pick out the red tourmaline.
3, there are two types of common tourmaline counterfeit goods, one is artificial coloration of colorless tourmaline, the other is processed by red glass. The method of identification is that the true tourmaline often has obvious dichroism, visible double shadow, tubular wrap or cotton batt in the body, and the cross section of the crystal is a curved triangle. These characteristics are not found in the imitation goods, the worker's dyed tourmaline, due to the color stagnation, lacks the natural treasure of the "Baoguang."
4, we can familiarize with the characteristics of true tourmaline and effectively avoid buying fake tourmaline. In general, tourmaline has the following characteristics: the density of tourmaline is large (3.06), and the amount of hand rub is heavier than that of crystal and glass. The pleochroism of tourmaline is obvious under different directions of transmitted light, and its color tone and brightness will be Changes occur, while amethyst is not obvious, glass does not appear; tourmaline has obvious birefringent ghosting effect. The refractive index of tourmaline is 1.616—1.650, birefringence can reach 0.044, and it is observed through the tourmaline crystal with a magnifying glass. Surface ridges and impurities will have obvious ghost effect; electrostatic effect tourmaline has thermoelectric effect, which can absorb fine dust and paper scraps after friction heat generation; the inner inclusions of inclusions tourmaline often have oriented linear and tubular vapor-liquid inclusions. Crystal, topaz, etc. are mostly irregular spots and feather-like inclusions; glass will appear bubbles and swirls. The growth pattern of tourmaline For the natural tourmaline crystal, the growth of the curved triangular cylinder and the parallel cylinder is the main feature distinguishing crystal and beryl.
5, green tourmaline is easy to mix with olivine, green diopside, green garnet. Due to the large birefringence of the tourmaline, a clear rear facet phantom can be observed in the proper position without the garnet. The inner pericarp of olivine and tourmaline is distinctly different. The olivine has characteristic water lily-like inclusions and the tourmaline contains typical irregular linear and thin cavities. Some tourmalines can see a large number of parallel fibers. The tourmaline is a one-axis crystal that moves up and down in the two shadow boundaries of the refractometer, and the other does not move.
I believe that everyone has a preliminary understanding and understanding of how to identify true and false tourmalines. At the same time, I hope that everyone can purchase the products that are satisfying when buying tourmaline, and avoid buying fake tourmaline products.
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