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Since recorded history, there were mentions of pearls. For thousands
of years, pearls are treasured in every culture and regarded as
one of the most precious gems.
A
pearl is an organic gem that grows in bivalve mollusks. For natural
pearls, they begin with very small foreign objects entering the
mollusks, or oysters, that cause irritation. The oysters then produce
a soothing secretion called conchiolin and secrete a whitish substance
called nacre over the conchiolin. When we look at a pearl, the nacre
is what we see. Because natural pearls are all nacre, it takes several
years or more to produce even a 5 millimeter pearl. Natural pearls
have become extremely rare due to pollution and over fishing which
has exhausted the wild mollusks that produce them.
In
late 19th century, a breakthrough in domesticated pearl farming,
called pearl culturing, occurred. Among the few most successful
persons, Tokichi Mikimoto was the most famous in culturing round
pearls. Today, almost all pearls on the market are cultured pearls.
To
culture a pearl, a highly skilled person carefully inserts a small
round piece of shell, or nucleus, into the oyster, with a tiny piece
of mantle tissue from another oyster attached to the nucleus. This
nucleation process is also called seeding. The oyster is then returned
to the water, and layers of nacre grow inside of the oysters over
a period of time, usually between 6 months and 3 years. Periodically,
the oysters are checked and examined to ensure healthy growth. Natural
disasters out of the control of the pearl farmers, earthquakes,
for example, can cause devastating damage to pearl crops. For those
oysters that survive the nucleation process, only a small percentage
will produce lustrous, round, and beautifully colored pearls.
No
two pearls are alike. Therefore, matching a pearl strand or just
a pair of earrings can be a challenging task. Luster, size, shape,
color and surface cleanliness all need to be sorted and matched.
To ‘make’ a strand of pearls, it often takes more than
10,000 pearls to complete the matching process. When the final product
is perfectly done, the outcome is a long lasting piece of jewelry
for generations to enjoy.
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