Either saltwater pearls or freshwater pearls can be natural or cultured. Natural means that there is no human intervention and the pearl is formed naturally by the oyster or mussel. The pearl oyster secretes nacre an iridescent material made of calcium carbonate. The nacre will coat a microscopic irritant entering its shell until a pearl is formed. On the twisted pearl necklace other hand, cultured means that a pearl grower will carefully open the shell and introduce a small object as an irritant (commonly a bead or metal), then get them back into the water and wait for the pearl to form. This usually takes 2-5 years.

earls are elegant jewelry. You can buy them shaped as necklaces, bracelets, earrings or even as an accent to a ring. There are hundreds, if not thousands of opera or rope necklace pearl jewelry designs to choose from in the market today. Before you buy one for yourself, you should learn how to identify if what you are getting is genuine or fake.

First, you have to know the kind of pearl that is available in the market. They are categorized in two:

   1. Saltwater pearls - these are formed inside oysters that are living in the heart of the ocean. It has three types - Tahitian, Akoya, and South Sea Pearls - depending on the kind of oyster that produced it.
   2. Freshwater pearls - these are formed inside mussels that are living in lakes, rivers, ponds, or any other body of freshwater pearl necklace fresh water