True or false crystal identification method

(1) Seeing: In the formation process of natural crystals, it is often influenced by the environment and always contains some impurities. When observing the sun, you can see a faint even and small horizontal stripes or catkins. The fake crystals are often made of slags and glass slags that have been smelted. They have been polished and coloured to imitation. There are no uniform stripes or catkins.

(2) Tongue: Even in the hot summer days, there are cold and cool feelings when you use your tongue to pick up the natural crystal surface. Fake crystal, no cool feeling.

(3) Light: Natural crystals are placed under the sunlight. No matter what angle they are viewed, they can give off beautiful brilliance. Fake crystal can not.

(4) Hardness: The hardness of the natural crystal is large. Grab the stone gently on the crystal and leave no trace. If there is a streaking mark, it is a fake crystal.

(5) Examination with a polarizer: In a polarizer, 360 degrees of rotation are natural crystals with four dark changes, and no changes are false crystals.

(6) Check with two colors: natural amethyst has dichroism and false crystal has no dichroism.

(7) Check with a magnifying glass: Using a ten-fold magnifying glass to check under transmitted light, the bubble can be basically identified as false crystal.

(8) Check with the hair: The crystal is placed on a hair. If the human eye can see the double image of the hair through the crystal, it is a natural crystal, mainly because the crystal has birefringence.

(9) Detection with a thermal conductivity meter: The thermal conductivity meter is adjusted to a green 4 grid test gems, and the natural crystal can rise to the yellow grid 2 while the false crystal does not rise and rises to a yellow grid when the area is large.