There are no pearls that are born on the outside of the shell

No. They all grow in shells, otherwise how to form pearls.

No way. Pearls are foreign substances such as sand and grit that enter the shell and cause pain, so nacre is secreted to envelop it layer by layer.

Lebanese poet Gibran: Pearls are temples built around the grit of pain.

I don't think so, it's usually formed in shells.

1., spinnaker mussel, commonly known as river mussel, pearl mussel, freshwater pearl mussel, triangular mussel, is the main mother oyster producing freshwater pearl. It is widely distributed in Hunan, Hubei, Anhui, Jiangsu, Zhejiang, Jiangxi and other provinces, especially Dongting Lake and medium-sized lakes in China.

2. The Marskoya shell, also known as the Hepu shell, has good pearl quality and is the main shellfish species of Akoya seawater pearls produced at present. It is mainly distributed in Guangdong, Guangxi, Taiwan, from the south of Qianye County, Japan to the Philippines, Vietnam, Myanmar, Indonesia, Sri Lanka and Australia.

3. Black lipped oysters mainly grow in the coastal areas of the Nisaean atoll in the French Poly state, the Cook Islands, Panama Island and the Gulf of Mexico, and are also found in the waters of Weizhou Island in the South China Sea. It is a mother oyster of Tahitian black pearl.

4. Golden butterfly oyster is a mother-of-pearl that breeds South Sea gold pearls, mainly produced in the Philippines, Indonesia, Australia and other places.

5. Pond butterfly oyster, pond butterfly oyster is a large-shaped black shell, the shell is pure source black, the nacre is thick, gray-white or gray-purple. Using this shell to nurture pearls, pearls with strong pearls, delicate surface quality and large round particles can be bred. Pearls that belong to terrestrial lakes and grow in rivers are seedless pearls.

When small sand and small stones enter the shell, the secretions secreted by the shell react with it, and after a long period of friction, these substances are wrapped layer by layer, and they become pearls for a long time.

Identifying the quality of pearls:

Generally, pearls below 6mm are not included in the category of jewelry-grade pearls, 7-9mm are generally loved by the public, 10mm pearls are rare, and only South Sea pearls and black pearls above 11mm are available;

Luster is the filial piety of pearls as the soul. Pearls with no light and less light lack aura. To see the light, the pearl should be placed flat on a soft white cloth, and you can see the warm luster of the pearl flowing; When you look at the light, a good pearl can see a colorful rainbow light, rich in layers, and you can also see a spherical surface similar to a metallic texture;

The rounder the pearl, the more beautiful it is, which is very in line with the aesthetic habits of the Chinese. The round pearl shows the beauty of the full moon. Generally, the roundness can be seen with the naked eye;

The fewer acnes, spots, marks, pits, and spots on the surface, the better, and generally the standard is acceptable if the flaws are not visible at a distance of meters;

Each pearl is unique and unique, and it is not easy to find two or more that are consistent. Try to choose pearls that are similar to the above in luster, size, color, and roundness, and match them in pairs.