Usually, the artificial treatment of inferior tourmaline is mainly filled with glue injection, and this filling method is mainly used on some coarse-brimmed tourmaline carvings and beads. Because this type of tourmaline has many internal cracks, coarse texture and poor permeability, it can not only improve its transparency but also cover some cracks after filling with glue. However, the injection of tourmaline is not genuine after all, although it is close to all aspects, its texture is not as good as the tourmaline. Like the artificially treated jade, with a magnifying glass, the surface of the tourmaline filled with glue is similar to the erosion trace of the spider web. When viewed under the light, its transparency and gloss are not as good as the original, and there are some impurities inside. Even a turbid gel. Another point to note is that if it is a tourmaline-cut gemstone, then the gelatin-treated tourmaline has a cut surface that is darker than the natural tourmaline. The permeability and internal structure of the natural tourmaline section are quite good, and no cracks or impurities are visible, so it can be distinguished from the point of view whether it has been manually treated. Colorful Tft Lcd,4.5 Inch Tft Lcd,Tft Display 4.5 Inch,Tft Display Touch Screen Shenzhen Yetai Optoelectronics Technology Co.,Ltd. , https://www.yetailcd.com