Doha vs Pearl

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Doha (Arabic: الدوحة‎, ad-Dawḥa or ad-Dōḥa, pronounced [adˈdawħa]) is the capital and most populous city of the State of Qatar. It has a population of 956,460 (2015). The city is located on the shore of the Persian Gulf in the east of the country, North of Al Wakrah and South of Al Khor. It is Qatar's fastest growing city, with over 80 percent of the country's population living in Doha or its surrounding suburbs, and it's the political and economic center of the nation. Doha was founded in the 1820s as an offshoot of Al Bidda. It was officially declared as the nation's capital in 1971, when Qatar gained independence from being a British Protectorate. As the commercial capital of Qatar and one of the emergent financial centers in the Middle East, Doha is considered a beta-level global city by the Globalization and World Cities Research Network. Doha accommodates Education City, an area dedicated to education and research; Hamad Medical City, an Hamad Medical Corporation administrative area of medical care which includes Hamad General Hospital, Heart Hospital, Women's Wellness and Research Center and Qatar Rehabilitation Institute as well as a number of specialty clinics and support infrastructure.

Finally, it also includes Doha Sports City, or Aspire Zone, a global sports destination which includes Khalifa International Stadium, a FIFA WorldCup 2022 stadium, as well as Hamad Aquatic Center, and the Aspire Dome. The city was host to the first ministerial-level meeting of the Doha Development Round of World Trade Organization negotiations. It was also selected as host city of a number of sporting events, including the 2006 Asian Games, the 2011 Pan Arab Games and the majority of the games in the 2011 AFC Asian Cup. In December 2011, the World Petroleum Council held the 20th World Petroleum Conference in Doha. Furthermore, the city hosted the 2012 UNFCCC Climate Negotiations and is set to host the 2022 FIFA World Cup. The city has also hosted the 140th Inter-Parliamentary Union Assembly in April 2019.

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