Pearl vs Messina

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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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Messina (, also US: , Italian: [mesˈsiːna] (listen); Sicilian: Missina [mɪsˈsiːna]; Latin: Messana; Ancient Greek: Μεσσήνη, romanized: Messḗnē) is the capital of the Italian Metropolitan City of Messina. It is the third largest city on the island of Sicily, and the 13th largest city in Italy, with a population of more than 231,000 inhabitants in the city proper and about 650,000 in the Metropolitan City. It is located near the northeast corner of Sicily, at the Strait of Messina, opposite Villa San Giovanni on the mainland, and has close ties with Reggio Calabria. According to Eurostat the FUA of the metropolitan area of Messina has, in 2014, 277,584 inhabitants.

The city's main resources are its seaports (commercial and military shipyards), cruise tourism, commerce, and agriculture (wine production and cultivating lemons, oranges, mandarin oranges, and olives). The city has been a Roman Catholic Archdiocese and Archimandrite seat since 1548 and is home to a locally important international fair. The city has the University of Messina, founded in 1548 by Ignatius of Loyola. Messina has a light rail system, Tranvia di Messina, opened on 3 April 2003. This line is 7.7 kilometres (4.8 mi) and links the city's central railway station with the city centre and harbour.

Source: Wikipedia