Under ultraviolet light, real natural jadeite has no fluorescence reaction.
Under the soaking of chemicals, a large number of resin chemicals remain in jadeite, and fluorescence will appear under the irradiation of purple light.
Other inspection methods of jade:
1, dripping water identification method: drop a drop of water on jade. If it is dewdrop-shaped, it is real jade.
2, two-handed touch method: If it is real jade, it feels cold and lubricated by hand.
3, high-light observation method: observe the jade in the high light, the color is clear, and the green distribution is uniform.
4, the tip of the tongue identification method: the tip of the tongue licking the real jade has astringency, and the fake jade does not.
5, magnifying glass observation method: you can also use a magnifying glass to observe, mainly to see if there are cracks, the value of cracks is greatly reduced.
Extended data
Matters needing attention in appraisal
1, color: color is the primary factor that determines the value of jade. If the color is a little worse, the value is much worse. Therefore, it is very important to observe colors correctly. Emerald will be brighter and more saturated under incandescent lamp, which is called "beauty under the moon, jade under the lamp". The same piece of jade will be relatively bright and dark when observed in the sun. Usually people take the color observed in natural light as the standard.
2. Transparency: refers to the degree to which jadeite allows visible light to pass freely. Due to the different thickness and combination of jadeite particles, the ability to allow light to pass through is also different. If most of the light can't penetrate, the color of jadeite appears dull, which is called "dry" in jargon.
If most of the light passes through the jade, the transparency will be high, which will make the jade look very crystal clear and have the feeling of "watery", which is vividly called water foot in jargon. Appreciating jade with high transparency will make people feel intoxicated. This kind of jade has a moist feeling, as if the color is alive and can be released around.
3. Volume: under the same conditions as color, species, bottom, workmanship and cracks. The bigger the volume, the more expensive it is, which has a greater impact on high-priced jadeite.
4. Workmanship: For jewelry such as ring faces and earrings, it is required to be cut properly and polished well; For pendants and ornaments, craftsmen's ingenious ideas and skillful skills will play a decisive role.
References:
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