Knife method to identify jade: natural jade has a high hardness, you can use a knife to mark jade jewelry, if it is A cargo jade, there will be no change; and if it is artificially treated jade, there will be debris after scribing The surface falls.
Knocking method to identify jade: natural jade is true jade, among the five virtues, the ancients will use "the sound of Shu Yang" to describe the sound of jade. If you gently slap the jade, the sound is relatively crisp, then it is natural jade; if the sound is very dull, then it should be treated jade.
Blisters to identify jade: soak the jade in boiling water for a few minutes. If the water and jade are changed color, it is definitely not natural jade; if the water surface has a gel, it is filled with jade; if it is both faded There is a gelatinous body floating, then it is dyed and filled with jade, commonly known as B+C jade.
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