The internal identification of jadeite bracelet can be observed by magnifying glass and microscope. If the interior is gas or gas-liquid mixture, it is mostly artificial emerald. If different forms are mixed together, it means natural emerald.
Fluorescence can also be recognized by a special ultraviolet flashlight, and ultraviolet light shines on the jade bracelet. If the emerald shows red fluorescence, it means that the emerald is true, and if it is other colors, it means it is false.
Thermal conductivity meter can also be used for identification. After the jade bracelet is laid flat on the table, turn on the switch of the thermal conductivity meter, and at the same time, point the metal contact at the top of the thermal conductivity meter at the surface of the jade bracelet, and light it for 5 times to indicate that it is true, otherwise it is false.