Blue Nile Glossary
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  Pearl:  
  Pearls are formed when an irritant occurs or is inserted into an oyster or other mollusk. The mollusk forms layers of nacre over the irritant, eventually forming what we know as a pearl. Pearls are the birthstone for the month of June.

See also: Irritant, Nacre, Pearl Education, Gemstone Jewelry, Birthstone Jewelry.

 

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