(1) Seeing: In the process of forming natural crystals, it is often affected by the environment and always contains some impurities. When observing the sun, you can see the faint uniform small horizontal stripes or catkins. The fake crystals are often smelted with crystal slag and glass slag. After polishing and coloring, there is no uniform streaks or catkins. (2) Tongue: Even in the hot summer days, using the tongue to rub the surface of the natural crystal, there is a cold and cool feeling. Fake crystals have no cool feeling. (3) Illumination: The natural crystal is placed vertically under the sunlight, and it can give off beautiful brilliance from any angle. Fake crystals can't. (4) Hardness: The natural crystal is hard, and the stone is gently stroked on the crystal without leaving traces; if there are streaks, it is a fake crystal. (5) Check with a polarizer: 360 degrees under the polarizer is a natural crystal with four dark and four dark changes, and no change is a fake crystal. (6) Check with two colors: natural amethyst has dichroism, and fake crystal has no dichroism. (7) Check with a magnifying glass: Under the transmitted light with a ten-fold magnifying glass, the bubble can be found as a fake crystal. (8) Check with hair silk: Put the crystal on a hair silk, the human eye can see the double shadow of the hair through the crystal, it is natural crystal, mainly because the crystal has birefringence. (9) Detection by thermal conductivity meter: The thermal conductivity meter is adjusted to the green 4 grid test gems, the natural crystal can rise to the yellow 2 grid, and the fake crystal does not rise, and rises to a yellow grid when the area is large. Another feature of natural crystals, especially amethysts, is the hexagonal ribbon like sapphire. It is interesting to note that in recent synthetic green crystals, parallel ribbons often appear, and the ribbons develop in parallel along the surface of the daughter nucleus. The third characteristic of synthetic crystals is that they are clean and flawless. Natural crystals often have inclusions and cotton, while synthetic crystals are crystal clear. Individual synthetic crystals have bubbles or some solid impurities. Recently, some synthetic crystals often have some triangular long tubular pores in which there are green or red powders. The long tube is characterized by being arranged in parallel in one direction, the section is triangular, and there are often uneven green or red powders distributed along the wall, the middle is often empty, and the end of the long tube has a tendency to become sharp. The true natural hair crystal is a crystal containing minerals such as tourmaline, actinolite, rutile, etc. These minerals each have their crystal form, such as the "bamboo-like" form of the actinolite. They are wrapped in crystals, arranged in a non-directional manner, thick and slender, short and different, often accompanied by inclusions and cotton inherent in natural crystal. Aluminium Panel,Aluminum Roof Panels,Aluminum Composite Panel,Aluminium Composite Panel Price SHAOXING YOTO IMPORT&EXPORT CO., LTD , https://www.sxyotoes.com
Amethyst identification method