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What is a Pearl?

According to the U.S. Government's Federal Trade Commission's* guides
for jewelry, the following definitions pertains to pearls, both vintage pearls
for costume jewelry and natural pearl jewelry:

Definitions:

(a) Pearl: A calcareous concretion consisting essentially of alternating
concentric layers of carbonate of lime and organic material formed within
the body of certain mollusks, the result of an abnormal secretory process
caused by an irritation of the mantle of the mollusk following the intrusion of
some foreign body inside the shell of the mollusk, or due to some abnormal
physiological condition in the mollusk, neither of which has in any way been
caused or induced by humans.

(b) Cultured Pearl: The composite product created when a nucleus (usually
a sphere of calcareous mollusk shell) planted by humans inside the shell
or in the mantle of a mollusk is coated with nacre by the mollusk.

(c) Imitation Pearl: A manufactured product composed of any material or
materials that simulate in appearance a pearl or cultured pearl.

(d) Seed Pearl: A small pearl, as defined in (a), that measures
approximately two millimeters or less.


To purchase vintage jewelry with cultured pearls or imitation pearls, please
click here.

*For more information about pearls and the purchasing and manufacture of
pearls, visit the ftc.gov website.
Check out other vintage jewelry
related articles here.


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