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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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Minneapolis ( (listen)) is the largest and most-populous city in the US state of Minnesota and the seat of Hennepin County, the state's most-populous county. As of 2019, Minneapolis has an estimated population of 429,606, making it the 46th-largest city in the US, the 8th-largest in the Midwestern United States, and the second-most densely populated large city in the region behind Chicago. Minneapolis and its neighbor Saint Paul make up the Twin Cities, with Minneapolis being the larger of the two. The Twin Cities metro and their surrounding suburbs contain about 3.64 million people, making it the third-largest economic and population center in the Midwest and the 16th-largest metropolitan area in the US.Minneapolis lies on both banks of the Mississippi River, just north of the river's confluence with the Minnesota River, and adjoins Saint Paul, the state's capital. The city is abundantly rich in water, with 13 lakes, wetlands, the Mississippi River, creeks and waterfalls; many connected by parkways in the Chain of Lakes and the Grand Rounds National Scenic Byway.
Virginia ( (listen)), officially the Commonwealth of Virginia, is a state in the Mid-Atlantic and...
Toulon (UK: , US: , French: [tulɔ̃]; Provençal: Tolon (classical norm), Touloun (Mistralian...
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