Cherkasy vs Pearl

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Cherkasy (Ukrainian: Черка́си, pronounced [t͡ʃɛrˈkɑsɪ]), also known as Cherkassy (Russian: Черка́ссы [tɕɪrˈkasɨ]), is a city in central Ukraine. Cherkasy is the capital of Cherkasy Oblast (province), as well as the administrative center of surrounding Cherkasky Raion (district) within the oblast. The city itself is designated as a city of oblast significance and does not belong to the raion. Population: 274,762 (2020 est.)Cherkasy is the cultural, educational and industrial center of Cherkasy Oblast and Central Economical Region of Ukraine.

Cherkasy has been known since the 13th century and played a great role in the history of Ukraine. The city was the center of Cossacks, citizens took part in Khmelnychchyna and Koliyivschyna (cossacks' and peasants' rebellions). The city is located on the right bank of Dnieper River (specifically at the Kremenchuk Reservoir), about 200 km (124 mi) south of the nation's capital, Kyiv. Cherkasy is divided into 2 boroughs (raions): Sosnivskiy (with Orshanets village) and Pridniprovskiy. In June 2011, the city celebrated its 725th anniversary.

Source: Wikipedia

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A pearl is a hard, glistening object produced within the soft tissue (specifically the mantle) of a living shelled mollusk or another animal, such as fossil conulariids. Just like the shell of a mollusk, a pearl is composed of calcium carbonate (mainly aragonite or a mixture of aragonite and calcite) in minute crystalline form, which has deposited in concentric layers. The ideal pearl is perfectly round and smooth, but many other shapes, known as baroque pearls, can occur. The finest quality of natural pearls have been highly valued as gemstones and objects of beauty for many centuries. Because of this, pearl has become a metaphor for something rare, fine, admirable and valuable. The most valuable pearls occur spontaneously in the wild, but are extremely rare. These wild pearls are referred to as natural pearls. Cultured or farmed pearls from pearl oysters and freshwater mussels make up the majority of those currently sold.

Imitation pearls are also widely sold in inexpensive jewelry, but the quality of their iridescence is usually very poor and is easily distinguished from that of genuine pearls. Pearls have been harvested and cultivated primarily for use in jewelry, but in the past were also used to adorn clothing. They have also been crushed and used in cosmetics, medicines and paint formulations. Whether wild or cultured, gem-quality pearls are almost always nacreous and iridescent, like the interior of the shell that produces them. However, almost all species of shelled mollusks are capable of producing pearls (technically "calcareous concretions") of lesser shine or less spherical shape. Although these may also be legitimately referred to as "pearls" by gemological labs and also under U.S. Federal Trade Commission rules, and are formed in the same way, most of them have no value except as curiosities.

Source: Wikipedia