Pearl vs La Rochelle

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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

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La Rochelle (; French: [la ʁɔʃɛl]; Poitevin-Saintongese: La Rochéle) is a city in southwestern France and a seaport on the Bay of Biscay, a part of the Atlantic Ocean. It is the capital of the Charente-Maritime department. With 75,735 inhabitants in 2017, La Rochelle is the most populated commune in the department and ranks fifth in the New Aquitaine region after Bordeaux, the regional capital, Limoges, Poitiers and Pau. Its inhabitants are called "les Rochelaises" and "les Rochelais". Situated on the edge of the Atlantic Ocean the city is connected to the Île de Ré by a 2.9-kilometre (1.8-mile) bridge completed on 19 May 1988. Its harbour opens into a protected strait, the Pertuis d'Antioche since the Middle-Ages. It is in fact a "Door océane" by the presence of its three ports (of fishing, trade and yachting). City of strong commercial tradition, its port was active from its origins and knew an important development during the classic period, then in the contemporary period thanks to the port site of La Pallice which is the only deep water port of the French Atlantic coast and hoists it henceforth to the sixth national rank.

The city traces its origins back to the Gallo-Roman period attested by the remains of important salt marshes and villas. The Dukes of Aquitaine granted it a charter of free port in 1130. The opening of the English market following the second marriage of Eleanor of Aquitaine in 1152, the presence of the Knights Templar and the Knights of Saint John of Jerusalem, quickly made this small town the largest port on the Atlantic.To this day city still possesses a rich historical, including its Saint-Nicholas tower, and urban heritage. The capital of Aunis has become the most important coastal city between the Loire and Gironde estuaries. Its urban activities are multiple and strongly differentiated. A city with port and industrial functions that are still important, it has a predominantly administrative and tertiary sector that is reinforced by its university and a rapidly developing tourism industry. In the recent years, the city has consistently been ranked among France's most liveable cities

Source: Wikipedia