Identification of genuine crystal jewelry

 (1) watch: natural crystal in the formation process, often the total environmental impact by containing some impurities, when viewed against the sun, you can see faint stripes or even small catkin-like substance. The fake crystal jewelry and more use of defective grain residue, broken glass melting, after the polishing process, color copy is made, there is no uniform stripes, catkin-like substance.
 (2) The tongue licking: Even in the hot dog days of summer, licking natural crystal surface, there are cold and cool feeling. False, no cool feeling.
 (3) Light: natural crystal jewelry heel in a sunlight, regardless of the perspective from which it can emit a beautiful luster. False can not.
 (4) Hardness: hardness of natural crystal, jewelry gently with a stone in the program, for no traces; if left streak, it is fake.
 (5) with polarized light microscopy: a 360-degree rotation in the polarizing microscope, four out four dark change is a natural crystal jewelry, no change is false.
 (6) using two-color check: There are two natural amethyst color, leave no dichroism.
 (7) with a magnifying glass to check: with ten times the magnifying glass in transmitted light inspection, basically to find the bubble as a fake.
 (8) Check with the hair: the crystal jewelry on a human hair, the human eye can see the hair through the double-crystal film, and was natural, mainly because it has a birefringence. (9) was detected with a thermal conductivity: the thermal conductivity meter adjusted to the green grid test 4 stones, natural crystals can be up to the yellow 2 cells, while the fake is not increased, when the area is a large yellow rose to a grid.