pearl | ˈpər(-ə)l
An organic gem grown within oysters and other mollusks which is most valued and sought after when it is are perfectly round and lustrous
Pearls form as a result of an irritant or foreign body that has made its way into the oyster or mollusk shell. The living oyster or mollusk's natural reaction is to secrete nacre (the luminous substance that forms around the irritant). This process can take between five to eight years, usually the entire life of an oyster or mollusk. With the progress of science, this process has been reproduced using human intervention to create cultured pearls. Natural pearls are made with no human intervention.