(1) a glance:in the process of forming natural crystal jewelry, often contain the environmental impact of some impurities, in front of the sun observation, you can see the light or even a small cross striations catkin-like material. Fake crystal beads use the crystal residue, window dregs smelting, processing the polished, colored copy from, no uniform stripes, catkin-like material.

(2) tongue licking: Even in the hot summer of the dog days, with the tongue licking natural crystal surface, but also cold and cool feeling. Fake crystal has no cool feeling.

(3) illumination: natural crystal set under the sunlight, no matter from which angle it can produce beautiful glory. Crystal can not leave.

(4) hardness: the hardness of natural crystal, jewelry used in the gravel on the gently zoned, would not stay traces left of the mark if it is false crystal.

(5) using polarized light microscopy: polarized light microscopy in the 360-degree rotation, four out of four dark change is the natural crystal, no change is false crystal.

(6) with two-color check: There are two colours of purple crystal.Color of the false crystal did not.

(7) with the magnifying glass inspection: 10 times magnifying glass used in optical transmission inspection, the bubble could be found to be generally as false crystal.

(8) with hair check: Crystal will be placed on a human hair, the human eye can see through the crystal double shadow of hair, compared with natural crystal, mainly because of a crystal birefringence.

(9) detected by thermal conductivity: using the thermal conductivity-conditioning 4 grid to test green gemstones , natural crystal can be increased to 2 yellow grid, and do not leave crystal increase, when the large area rose to a yellow grid.