The jewelry processing manufacturer said that the natural crystal always contains some impurities due to the environmental impact during its formation. When looking at the sun, you can see light, uniform and small horizontal stripes or catkins. The fake crystal ornaments are mostly made of defective crystal slag and glass slag smelting, after polishing, coloring and imitation, without uniform stripes and catkins.

The natural crystal jewelry is placed vertically under the sunlight, which can give out beautiful luster no matter from which angle. False is not. Even in the dog days of hot summer, licking the surface of natural crystal with your tongue can make you feel cold and cool. False, there is no cool feeling. The hardness of natural crystal is high, so you can use crushed stone to gently scratch on the jewelry without leaving traces; If there are streaks left, it is a fake. Turning 360 degrees under the polarizer, those with four bright and four dark changes are natural crystal ornaments, while those without changes are fake.

Check with a tenfold magnifying glass under transmitted light, and the bubbles that can be found can be basically regarded as false. Natural amethyst has dichroism, and false amethyst has no dichroism. It is natural to place crystal jewelry on a hair, and the human eye can see the double shadow of the hair through the crystal, mainly because it has birefringence. Adjust the thermal conductivity meter to the green 4 grid to test the gemstones. The natural crystal can rise to the yellow 2 grid, but the false one will not rise. When the area is large, it will rise to the yellow 1 grid.