Crystal Identification Nine Points
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Crystal products are very common, crystal clear and cheap, and are the decorations that everyone loves. However, how to identify crystal and ordinary glass products? The true and false crystal identification method is as follows:
Illumination: The natural crystal is placed vertically under the sun, and it can give off beautiful brilliance from any angle. Fake crystals can't.
Check with polarizer: Under the polarizer, the 360 degrees is changed by the natural crystal, and the unchanged is the fake crystal.
Seeing: Natural crystals are often affected by environmental influences during the formation process. When viewed from the sun, you can see a faint uniformity of fine 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.
Check with two colors: natural amethyst has dichroism, and fake crystal has no dichroism.
Hardness: The hardness of the natural crystal is large. Use the gravel to gently stroke the ornament, leaving no trace; if there are streaks, it is a fake crystal.
Check with a magnifying glass: Under the transmitted light with a ten-fold magnifying glass, the bubble can be found as a fake crystal.
Check with the hair: put the crystal on a hair, the human eye can see the double shadow of the hair through the crystal, it is natural crystal, mainly because the crystal has birefringence.
Test with a thermal conductivity meter: adjust the thermal conductivity meter to the green 4 grid test gems, the natural crystal can rise to 2 squares, while the fake crystal does not rise, when the area is large, it rises to a yellow grid.
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.