http://walthamstow.london/News/%EF%BB%BFpc-science-and-engineering-institutesin-noida-extension-greater-noida-west-india-india-by-savottam/ Formation of a pearl inside a pearl oyster happens since of the presence of foreign material inside the body of the oyster. To save itself from the undesired material the mollusk coats the object with layer soon after layer of nacre. It takes several years for a mollusk to make a pearl of substantial size. The procedure by means of which the pearls are formed inside the physique of the mollusk is Wed, 11 Jan 2017 10:36:44 UTC en