The Capital of China is, by far, the 3rd most populated city in the world. Having population of 21.5 million (21,516,000), with a population density of 1,300/km2, it is countryâs center for education, culture and politics. Talking about politics, this city is the hub of politics in the country for, as long as, eight centuries.
A pearl is an organic mineral mixture formed with the soft living tissue of a shelled mollusk.Chemically pearls are made of calcium carbonate, either the mineral aragonite or a mixture of aragonite and calcite, sometimes also with minor vaterite.Pearls are used as gemstones, but are not regarded as true minerals due to their organic origin. pearl is an organic mineral mixture formed with the soft living tissue of a shelled mollusk.
Pearl is made of calcium carbonate with organic material (nacre) and water. A pearl is not mineral. The five characteristics a mineral must have is that it must be solid, it has to have a chemical composition, it has to be inorganic, and it has to be naturally made, also it has to have a definite crystalline structure.he pearl contains chemicals within it so it has a chemical composition. It is inorganic of course (it isn't made of any remains or organic substances). It is not naturally made, however, making it not a mineral.