First, the single refraction of diamond.

The single refraction of diamond is determined by its essential characteristics. While other natural gemstones or artificial gem are mostly birefringent. Under the observation of 10 times magnifying glass, it is easy to see the image of overlapping diamond edges and corners, and two bottom lights are presented at the same time. If the birefringence difference is small, such as zircon, you can also see the image of overlapping background light.

B. Adsorption of diamonds

It has a certain affinity for diamond grease and dirt, that is, oil stains are easily adsorbed by diamonds. So touching the diamond with your fingers will feel sticky, and your fingers seem to feel sticky. This is not found in any gem. This method needs training to master the nuances.

C, the characteristics of the straight line.

This diamond has a smooth polished surface. Dip a pen in ink and draw a circle on the diamond. If it is a real diamond, the surface will leave smooth and continuous lines, characterized by straight lines. Counterfeit products will leave a line of dots. You should look at it like this with a magnifying glass.

D, unique diamond luster

Under the incandescent light of about 100 degrees, it is easy to see which diamond has diamond luster compared with the counterfeit. This method should not be carried out in too dark or strong light.