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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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Wolfsburg (UK: VOLFS-burg, US: WUULFS-burg, VAWLFS-boork, German: [ˈvɔlfsbʊʁk] (listen)) is the fifth largest city in the German state of Lower Saxony, located on the Aller River. It lies about 75 km (47 mi) east of Hanover and 230 km (143 mi) west of Berlin.
In 2013, Wolfsburg ranked as the richest city in Germany with a GDP per capita of $128,000 due to its thriving auto industry.Wolfsburg is famous as the location of Volkswagen AG's headquarters and the world's biggest car plant. The Autostadt is a visitor attraction next to the Volkswagen factory that features the company's model range: Audi, Bentley, Bugatti, Ducati, Lamborghini, MAN, Neoplan, Porsche, Scania, SEAT, Škoda Auto and Volkswagen Commercial Vehicles.
Meknes (Arabic: مكناس, romanized: maknās; Berber languages: ⴰⵎⴽⵏⴰⵙ, romanized: amknas) is one...
Maryville is the name of several places. In the United States: Maryville, Tennessee Maryville,...
Hamburg (English: , German: [ˈhambʊʁk] (listen), locally also [ˈhambʊɪ̯ç] (listen); Low Saxon:...
Breda (, , Dutch: [breːˈdaː] (listen)) is a city and municipality in the southern part of the...