The formation triggers as and when any foreign particle such as a sand particle, any micro organism etc. enters inside the oyster's shell lining. The oyster gets irritated from it and starts secreting multiple layers of biological fluids around the particle to cover it up. These layers are actually nacre secreted from the linings of the oyster. The alternative lining of fluids cover the nuclei (foreign particle) resulting in a pearl.
The value of a pearl depends on how lustrous it is and how beautifully it has been finished. As pearls are very delicate, they are never subjected to any harsh treatments to enhance the aesthetic. They could be bleached to change the color and that is the only treatment they receive. However, pearls with no manual interference in their formation or enhancement are always valued more.
As pearl jewelry is one of the most important factors of a wedding, it is important to understand the various terms associated with this ultra-feminine gem.
Natural or genuine pearls:
When pearls are formed in natural ways without any human interference, they are called the natural pearls. Divided in sea pearls and freshwater pearls, natural pearls are always costly because they are rare and difficult to obtain.
Sea pearls or salt water pearls are again more valued as the oysters responsible for making them produce only one pearl at a time, thus giving a unique piece every time. South Sea pearls, Tahitian pearls, Akoya pearls and golden pearls are the famous salt water pearls.
Freshwater oysters can produce multiple pearls at one time, offering chances to find similar pearls. These pearls are more commonly used for jewelry.
When pearls are grown under natural conditions but with full human interference, the result is a cultured pearl. The rising demand of pearls years back had given a way for pearl farms where pearls can be grown on commercial level. These pearl farms have the similar conditions for the oysters as in their natural habitat. The oysters at the farm were subjects to a nuclei implantation so that they could start secreting linings to make a pearl.
The most popular pearl shapes are round and teardrops. However, you can find them in almost any shape and many times disfigured pearls are also used for jewelry.
The popularity of these beautiful and blissful gemstones have given a way to the imitation and faux market to rise. You could find plastic pearls made in factories and a substitute for natural pearl but they are not pearls and have no qualities the royal gem contains. Therefore, it is always advisable to ensure the originality of the gem you are buying. Never hesitate to ask if the pearl in natural, cultured or imitated.