Definitions for "Cultured pearls"
are pearls formed by the insertion of a piece of mantle tissue, with or without a nucleus, into the mother oyster or mussel.
Most pearls are farmed in monitored environments with the intent of commercial sale. These places are sometimes referred to as Pearl farms. The techniques used to implant an oyster (mollusk) to induce the pearl making process is called "culturing". Human intervention is used by implanting an oyster with food, mantle tissue, nuclei or other particles such as a round bead center. The oyster senses this implant as an irritant and will start to coat the interloper with a nacreous substance. This substance creates the layering of the pearl and is referred to as "nacre (naker)". It is perceived that the deeper the nacre layers the more valuable the pearl. In our opinion, only an experienced gemologist can actually determine a pearl's estimated value after review through microscopic x-ray techniques. Zhang's values academic vs. industry appraisal to avoid any conflicts of interest. As such we do not offer appraisals with purchase except on items purchased priced over $ 10,000.00 USD.
are formed by the introduction of a mother-of-pearl bead into an oyster. The oyster subsequently covers the bead with a layer of nacre, thus producing a cultured pearl. A natural pearl, by comparison, occurs when a tiny particle such as sand invades the body of a mollusk without human intervention. Natural pearls are more valuable than cultured pearls, yet the two are not easily distinguished. Artificial pearls are largely made of glass or even plastic.