First, judge the authenticity of the jade appraisal certificate:
1. First, carefully look at whether the shop opening organization that issued the jade jewelry inspection certificate has the right to issue the jade appraisal certificate.
2. Secondly, see if there is a capitalized "CMA" national measurement certification mark on the first line of the jade appraisal certificate. Please pay close attention to the fact that c contains "MA"; It also depends on whether there are two kinds of accreditation: "California Institute of Technology" and "CNAS" laboratories.
3. Thirdly, all legally issued certificates must be signed by the appraiser on the back, and they must be signed by two or more signatures to have legal benefits. One is the signature of the appraiser, and the other is the signature of the inspector.
4. Finally, look at the specific testing items on the jade appraisal certificate. Let's see if the appraisal result is jade (A goods) first. If it is jade A, it will be accompanied by the words "jade handle", "jade pendant" and "jade bracelet". If the appraisal result is not A goods, the result will be written as "optimized jade bracelet" and so on. In order to let customers and friends see clearly, the current jade appraisal institutions will clearly write the quality and style of the jade identified.
Second, the identification method of jade:
1, look at the color.
Formula: "The color is not correct, and the color floats without roots."
Color is evil, positive and abnormal flashing! This is mainly reflected in green. Nowadays, many C and B+C are mainly dyed green. Other colors are also available, which gives people the impression that the color is incorrect and evil!
Flash if you can't see the root! The main performance is that the color floats on the surface, there is no transition from the inside out, or it is too inconspicuous.
2. Look at the surface.
Tip: orange peel phenomenon and acid cracking.
Tip: Pick up the bracelet or jade, adjust the position of the bracelet or jade under the light (any light will do), grasp the reflective point on the surface of the bracelet, and visually check whether there are pits and acid cracks on the surface. If there is, the novice will leave immediately!
3. Look at the germplasm.
Formula: "Germplasm does not match."
This is mainly aimed at some jadeites, the particles are very thick, but overall it gives people a feeling of long head, which should not be the phenomenon of natural jadeite. (Except for some recrystallized emeralds, of course) Novices will flash when they see this kind of thing! Veterans can judge by other methods.
4. Look at the texture.
Method: Pick up a bracelet or jade and face the light. Note that this should be transparent (the third point above is not transparent). If the texture inside is messy, serious like nets and roots, novice, flash! Veteran, look out!
5. Listen to the sound.
Step: 1. Prepare an agate stick and a rope. (Most businesses have it. Be sure to ask him for it. Don't care about face. )
Hang the handle with a rope, and be careful not to hold it with your hands! Tap the bracelet gently with an agate stick (note that the agate stick shall prevail! Coins, keys and other DD are not accurate! )
Sound: The sound of A goods is melodious, as beautiful as the sound of wind chimes! B goods refer to only washed jadeite. Voice, dull and hoarse. Some slightly acid-washed DD sounds clear and clear, but they are very short, and there will be no melodious echo! C goods, voice, dull, hoarse. It's like picking up two keys and hitting each other.
6. Check the temperature?
Emerald or bracelet is a natural substance, which will not become hot, cold or cold as the environment gets hot. If the temperature is abnormal, the novice will flash.
7. Other methods: {7 method has low accuracy and can identify low imitation}? You can hold the jade in front of the sun, and there will be things like clouds in the jade, which will gather together in groups. It's not good to have too many clouds of jade. Jade is harder than other things. For example, you can put marks on the glass.
In addition, jade is cold. You can put a hair on it, light it with a lighter, and then the hair stuck on it will burn continuously.