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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.
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Örebro ( UR-ə-BROO, Swedish: [œrɛˈbruː] (listen)) is a city with 124,027 inhabitants, the seat of Örebro Municipality and the capital of Örebro County in Sweden. It is the sixth largest city in Sweden and one of the largest inland hubs of the country. It is located near the lake of Hjälmaren, although a few kilometres inland along the small river Svartån.
Arras ( ARR-əss, French: [aʁɑs] (listen); Picard: Aro; Historical Dutch: Atrecht [ˈaːtrɛxt]...
New York, often called New York City to distinguish it from New York State, or NYC for short, is...
Fontanès-de-Sault is a commune in the Aude department in southern France.