There are many shapes of pearls, such as round, oval, semicircular, egg-shaped, pear-shaped, drop-shaped, conjoined, baroque, irregular and so on. The rounder the pearl, the more beautiful it is, but the harder it is to cultivate, so the rarer it is. Therefore, the rounder the pearl of the same variety, the higher its value. Generally speaking, seawater pearls are mostly round.
Question 2: Why are pearls round? Pearls are formed by foreign bodies such as sand or parasites entering mollusks such as oysters, clams and clams. When these mollusks are defeated, they will cover the invaders with a shiny substance called pearl oyster, which is the mother of pearls. Pearls can grow into white, gray, black, red, blue, green, yellow and other colors, and its allure has made pearl collection industry appear thousands of years ago. Today, pearls are collected in oyster farms in the Indian Ocean, East Asia and the whole Pacific Ocean. People also implant round objects into these mollusks to make pearls for oysters. Pearls usually grow into a "rotating body" shape with a perfect rotational symmetry, which is formed by rotating around an axis. This can only form irregular spheres, water drops or eggs, but pearls on necklaces or rings worn by ladies are as smooth and round as stair handrails made of lathes. When people see such pearls, they will marvel at the wonder of nature. Pinctada is a magical material, mainly composed of aragonite, which is a kind of calcium oxide. This mineral is deposited layer by layer on the microstructure, and the organic film composed of protein and chitin makes the pearl oyster extremely hard and not easy to be damaged. It can also reflect light and interfere with light waves to form colorful pearls. The chemicals that make up the pearl shell are the same as those that form the oyster shell. Under the microscope, we can see that the surface of the pearl presents a terraced structure, because the surface of the pearl grows layer by layer at the same time. Therefore, Cartwright and his colleagues believe that these "terraces" are the key to the pearl rotation. They said that as new calcium, carbonate, chitin and protein particles are adsorbed on the terrace surface and become part of the growing crystal, they will release energy and increase the heat on the pearl surface. The surrounding water molecules will bounce off the "terraced fields" and take away the heat on the pearl surface. According to the law of conservation of momentum, this will produce a weak force in the opposite direction.
Question 3: Why are pearls mussels in a round lake? When mussel shells are opened, some external impurities, such as sand, will enter the shell and come into contact with its mantle. When the mantle touches * * *, it will secrete a compound of calcium carbonate. These calcium carbonate will be wrapped around impurities layer by layer, and after three to five years or even longer, it will form pearls. Due to the long-term non-stop movement and running-in of calcium carbonate in shellfish, pearls often form a smooth surface, which is spherical, oval, spherical or rectangular. Natural pearls are spherical, oval, irregular spherical or rectangular with a diameter of 1 ~ 6mm. The surface is white, yellowish white, light pink, light blue, etc. , with beautiful color and smoothness. Most decorated pearls have holes in the middle. It's hard and difficult to break, and the section has a layered feeling. It crackled with fire. No gas, slightly salty.
The shape of cultured pearls is similar to that of natural pearls, but the surface gloss is weak. There are round sand or concha Haliotidis fragments in the center of the section, and a thin layer of real pearls on the surface. Only the nacre is used as medicine. No gas, slightly salty.
Round particles, transparent luster, bright luster and hard texture are preferred.
Question 4: Is the pearl as round as possible? Which one is flat? There are many criteria to judge whether pearls are good or bad. For example, judging whether it is high-quality pearl jewelry from the combination of roundness, skin and light. Of course, the rounder the pearl, the more flawless the skin and the stronger the light. With high pearls, it is also a top grade, and the price will be higher. Flat pearls are more common, and their value is definitely not as good as round pearls!
Question 5: Is the pearl flat or the steamed bread round? Natural pearls are round, oval, irregular or rectangular with a diameter of 1 ~ 6mm. The surface is white, yellowish white, light pink, light blue, etc. , with beautiful color and smoothness. Most decorated pearls have holes in the middle. It's hard and difficult to break, and the section has a layered feeling. It crackled with fire. No gas, slightly salty.
The shape of cultured pearls is similar to that of natural pearls, but the surface gloss is weak. There are round sand or concha Haliotidis fragments in the center of the section, and a thin layer of real pearls on the surface. Only the nacre is used as medicine. No gas, slightly salty. However, the appearance of Hepu ecological pearls has greatly improved the quality of cultured pearls!
Round particles, transparent luster, precious light and hard texture are preferred. Mabei pearl is a kind of semi-pearl, also known as Mabei pearl, steamed bread pearl and semi-circular pearl.
Generally, after the cultured pearls are collected, the prefabricated semi-shaped pearl core is inserted into the inner wall of the shell, so that the convex surface faces the mother-of-pearl shell and the plane is close to the mother-of-pearl shell wall. After insertion, feed in water. Over time, the pearl layer wraps the outer pearl core layer by layer, forming a semicircle. When it is collected, it is extracted together with part of the shell wall of mother-of-pearl, and polished into an ornament, so it is huge. Mabibizhu is essentially a kind of regenerated pearl. Before this, each pearl oyster can produce two round pearls first, and then cultivate 3-7 Mabibi pearls. Especially Australian Mabibi beads have high yield, good quality, large particles, excellent luster, pure silvery white and smooth surface. The smallest is 10mm, and the largest is 17mm or more, with various shapes such as round, drop-shaped, oval and heart-shaped. Ma Bizhu jewelry is very popular in the world jewelry market. It is not only the pet of ladies and gentlemen, but also the unique and elegant jewelry created with Ma Bizhu is especially favored by gentlemen.
Question 6: There are many criteria for whether pearls are round or flat. For example, judging whether it is high-quality pearl jewelry from its roundness, skin and light. Of course, the rounder the pearl, the more flawless the skin and the stronger the light. Pearls with high matching degree can be considered as top grade, and the price will be higher. Flat beads are more common, and the value is definitely not as good as good quality round beads!
Question 7: Are tiny and round pearls valuable? According to your description, I think your pearls should be freshwater pearls, because seawater pearls are relatively rare and generally have high value, while freshwater pearls are mostly irregular in shape.
There are six main aspects to judge the quality of pearls:
1: shape, the rounder the pearl, the better.
2. Size, the bigger the better, the rarer it is like a diamond. Generally, pearls over 8mm are rare.
3. Gloss, the stronger the surface luster, the better. A good pearl can see its own shadow like a mirror.
4. Surface defects, the less defects, the better, the cleaner the better.
5. Color: The natural colors of freshwater pearls are white and pink, but pink is rare, so the price of pearls with the same quality and pink will be higher.
6. The matching degree of pearl necklace means that the size, color and luster of each pearl in the whole necklace should be very uniform.
You can check the quality of your pearls according to the above introduction.
Remarks: A good pearl necklace will be knotted between pearls. First of all, it will prevent the friction between pearls to protect them. Second, the necklace is broken, and not all the pearls are scattered. If your pearl necklace is not knotted, it should not be a good pearl.
These are all my experiences in the pearl business. You can have a look, but it's hard for me to price your pearls, because pearls don't need gold or silver, and only those who like them know their value.
Question 8: Is this kind of pearl real? Aren't pearls round? It's true. You look at the flaws, but they are the worst pearls. Not all pearls are round, even the first-class pearls with flawless and beautiful luster have other shapes!
Question 9: There are many criteria for whether a pearl is a semicircle or a full circle. For example, judging whether it is high-quality pearl jewelry from its roundness, skin and light. Of course, the rounder the pearl, the more flawless the skin and the stronger the light. Pearls with high matching degree can be considered as top grade, and the price will be higher. Flat beads are more common, and the value is definitely not as good as good quality round beads!
Question 10: What's the difference between a perfect circle, a near circle and a round pearl necklace? The percentage difference of pearl diameter is different.
Perfect circle ≤3
Circle ≤8 Closed circle ≤ 12
This is the national standard for freshwater pearls, but seawater pearls are different. For more details, please visit our college.
Sincerely hope to help you-Pearl Beauty (original high-end pearl brand)