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.
Emerald Composition Emerald gemstone (also known as panna) is made up of silicate class of minerals, known as âBerylâ. Beryl comprise the largest class of minerals, where as Emerald are only a small fraction of this class. Emerald stone can be found anywhere on the planet. Good quality Emerald gems are found in Muzi, Chivor and Cosquez.