1、? Direct the appearance of jade with a strong flashlight light source

The bright light jade flashlight shines directly on the surface of Hetian jade, which is translucent and relatively concentrated in rhyme, and the rhyme causes relative astigmatism when it shines directly on the mixed products of quartzite, marble and glass. When the flashlight with strong light shines on the jade, it can be judged whether the texture structure of the jade is uniform or not. When the flashlight moves according to the bright light of jade, the light transmittance of jade is uniform, indicating that the structure is uniform and the light transmittance is uneven, indicating that the structural uniformity of jade is not good enough.

2. 45 degrees oblique jade under strong light.

When judging the punctuality, aim the jade flashlight irradiated by strong light at the parallel surface of a certain surface of Hetian jade stone, with an oblique angle of 45 degrees, and irradiate it at a distance of about 3 ~ 10cm from the surface of Hetian jade stone. You can also gradually move parallel or far and near, look at the flocculent structure and emit more light, so as to judge the fineness and particle thickness of Hetian jade.

3. Strong light reflects jade.

When judging punctuality, use a strong light jade flashlight to cling to the reverse side of Hetian jade, and then gradually translate it to judge whether there are impurities or cracks in Hetian jade structure. When there are impurities, Hetian jade will have dark spots, and when there are internal cracks, it will have the ordinary dark response of flashlight light source or uneven refracted light change response when translating.

Matters needing attention in purchasing jewelry and jade:

1, choose the regular channel to buy.

Consumers should try to buy from large shopping malls and jewelry and jade shops with standardized management, and try not to buy at random in tourist attractions. If you want to choose online jewelry, you should choose a regular and reputable website or brand direct store, and guarantee that you can return it for seven days without reason. When shopping online, don't rely too much on the pictures of goods displayed in online stores, and don't trust the goods whose online price is too much lower than the market price.

2. Check the appraisal certificate carefully.

When consumers buy jewelry, they must ask for a jewelry appraisal certificate. The certificate should not only have the qualification of the institution, but also have the name, contact number, address, website and other detailed information of the appraisal institution. The certificate shall include the photo, name, color, purity, weight, density and refractive index of the jewelry under inspection.

3. Look at jewelry marks

According to the relevant national standards of precious metals, precious metal jewelry requires a complete imprint, including the manufacturer's code, material, purity and the quality of the diamond-encrusted jewelry. The letters in the imprint represent species and the numbers represent purity.