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Anonymous users2024-02-13Identification of pearl necklaces:
1. Vision: The shape of the pearl is not very regular, showing translucent jade white, yellow-white, light basket color, flesh red and other natural and unique multicolored fluorescent luster; The pseudo-beads are mostly glass imitations, with regular shape and uniform size, and are generally coated with silver powder or "glazing liquid" made of fish scales on the surface of the beads, with monotonous color and lack of halo.
2. Friction: Two pearls gently rub against each other, which will have a rough feeling, while fake pearls will produce a sliding feeling.
3. Drilling: Observe whether the drilling hole is clear and clear, and there is pigment accumulation in the drilling hole of the false beads.
4. Coldness: Pearls have a cold feeling when placed on the hand, but fake beads do not.
5. Scrape the real pearl with a knife, there will be white powder!
6. Fake pearls are flawless and have uniform particle size.
Extended Information: Features of Two Fake Pearls:
1. "Pearls" made of glass will look very bright and have a very regular shape. If it is a necklace, each bead will be very good and the size will be very consistent. If you look closely, you will see that its color is dead and does not change like a real pearl.
2. Shell-polished pearls are also very round, the shape is also very regular, the size is not too small, and they also have the luster of pearls, which can be said to be very difficult for ordinary people to distinguish. But if you look closely at its luster, all the light coming from it is in parallel streaks, no matter how you look at it. This is because the structure of the shell is parallel, while the cross-sectional structure of the pearl is concentric.
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Anonymous users2024-02-12At present, most of the best in the market are artificially cultivated. Cultured pearls are made by passing through long runs.
Shellfish such as white-lipped oysters, black lipped oysters or Pinctada martensii oysters are artificially cored, and then cultured in seawater for about a year, so that they can form pearl tracks on the nucleus particles in the natural ecological environment according to the biological characteristics of shellfish. Artificially cultivated special texture is hard, smooth and round, and the color is bright. People usually divide pearls into two categories: pearls and treasures, weighing more than 2 5 grams are called treasures, and those weighing less than 2 5 grams are called pearls.
Generally speaking, pearls with larger nucleoids, thicker tracks, and brighter luster are the longer they are cultured. The pearls produced by the white lipped oyster are the best, and the best pearls are placed in the shadow or in the dark, and they are still pearlescent and radiant.
1. Pearls are biological products, no two are exactly the same when they are made by living beings, take the necklace and compare it carefully, each pearl on the necklace is different, if the pearls on a string of pearls are the same, it must be fake, it is made by the machine. (l) Vision: The shape of the pearl is not very regular, showing translucent jade white, yellow-white, light basket color, flesh red and other natural and unique multicolored fluorescent luster; The pseudo-beads are mostly glass imitations, with regular shape and uniform size, and are generally coated with silver powder or "glazing liquid" made of fish scales on the surface of the beads, with monotonous color and lack of halo.
2) Feel: The pearl is very refreshing, even when the weather is hot, the tentacles feel very cool; If it is a pure glass imitation bead, the specific gravity is greater than that of the pearl, and if it is a wax-filled glass imitation bead, the specific gravity is only about half of the pearl. (3) Fire:
The pearl is burned on the gas lighter, the surface is intact, and the luster is still the same; After the pseudo-beads are burned, the surface will appear black smoke, and the luster will be lost.
2. Cut with a knife, peel the fake necklace, and remove the powder without leaving any traces after really cutting off the powder. If it's a fake boss, he won't let you chop, and the real boss will take the initiative to let you chop. In short, the truth and falsehood will be exposed as soon as they are scratched.
3. It is impossible to identify whether it is natural or artificially cultivated, and there is no difference between the two functions. **The bigger it is**, the darker ** the higher.
1. The color of the pearl. The luster of real pearls is like a seven-color rainbow, with many colors, but not particularly bright, shining under the sun, and the transparency is better. The surface of a fake pearl is brighter and monotonous, and it doesn't look very real, with little to no transparency. >>>More
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1. Water soaking method: take a few saffron filaments, put them in hot water, and observe the discoloration of the water. Although the filaments of saffron are red, its active ingredients are yellow after soaking in water, while fake saffron can only be dyed red and remain red after soaking in water. >>>More
1. Water soaking method: take a few saffron filaments, put them in hot water, and observe the discoloration of the water. Although the filaments of saffron are red, its active ingredients are yellow after soaking in water, while fake saffron can only be dyed red and remain red after soaking in water. >>>More
The bottleneck of the rock slab process is to make it bigger and thinner, if the products of the whole brand do not even have products above 3000mm or have products that are less than 1000mm on one side, such as 800 * 2400 and the like, you have to be careful that the slab is fake.