Tours vs Pearl

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Tours ( TOOR, French: [tuʁ] (listen)) is the prefecture of the Indre-et-Loire department and largest city in the Centre-Val de Loire region of Western France, although it is not the regional prefecture, which is the region's second-largest city, Orléans. In 2017, the commune of Tours had 135,787 inhabitants; the population of the whole metropolitan area was 495,379.Tours stands on the lower reaches of the Loire river, between Orléans and the Atlantic coast. Former Caesarodunum city of the Turones, founded by the Emperor Augustus, it possesses one of the largest amphitheaters of the Roman Empire. Known for the Battle of Tours (732), it is a National Sanctuary with Saint Martin, Gregory of Tours and Alcuin under the Merovingians and the Carolingians, with the adoption by the Capetians of the local currency the Livre tournois which became the currency of the kingdom. Capital of the county of Tours which became the Touraine, the garden of France. First city of the silk industry, wanted by Louis XI, royal capital under the Valois Kings with its Loire castles and city of art with the School of Tours.

Capital of loyalty during the French Wars of Religion and city of retreat in June 1940 which will lead it to be partly destroyed. The White and Blue city keeps nevertheless a historical center registered in the UNESCO and city of art and history with its Vieux-Tours, a remarkable patrimonial site. The garden city concentrates a green heritage and an urban landscape strongly influenced by its natural space. The historic city that is nicknamed "Le Petit Paris" and its region by its history and culture, has always been a land of birth or host to many personalities, international sporting events, university city with more than 30,000 students in 2019. Culinary city with its specialities : rillettes, rillons, Touraine vineyards, AOC Sainte-Maure-de-Touraine cheeses and nougats.The city is also the end-point of the annual Paris–Tours cycle race.

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