Pearl | |
---|---|
State | |
Country | |
Capital | |
Population | 0 |
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.
Ain Sefra | |
---|---|
State | Naâma |
Country | Algeria |
Capital | |
Population | 52320 |
Postcode | 45200 |
Aïn Séfra (Arabic: عين الصفراء, lit. yellow spring) is a municipality in Naâma Province, Algeria. It is the district seat of Aïn Séfra District and it has a population of 47,415, which gives it 11 seats in the PMA.
Málaga (, Spanish: [ˈmalaɣa]) is a municipality of Spain, capital of the Province of Málaga, in...
Mato Grosso (Portuguese pronunciation: [ˈmatu ˈɡɾosu] – lit. "Thick Bush") is one of...
Intsika Yethu Local Municipality is an administrative area in the Chris Hani District of the...