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| Pearl in the oyster. |
Pearl is a substance that is produced not only
by the oyster, but by most living things that are similar to oysters. The
process of formation of a natural pearl is rare. So today pearls are produced mainly
by the oyster farming industry learned thousands of years ago.
Pearls are actually produced from 'calcium carbonate' as well as materials
to produce the shell of the oyster itself. This layer is used to coat materials
that entered into the oyster shell that may consist of foreign objects such as
sand and other materials. These foreign objects can cause injury to the soft
parts of the oyster, so it needs to be overlaid with 'nacre' also known as 'mother
of pearl'. This material can be seen on the inside of an oyster shell or
other shellfish.
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| Various types of pearls produced by living things. |
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| Pearls extracted from oysters. |
Apart from used to make jewelries, pearls are
also used in cosmetics, drugs and even paint. While the pearls available today
are mostly produced through the oyster farming industry, to ensure that the
oyster producing pearls, the foreign objects are inserted manually into the
oyster to be plated with 'nacre' and
producing the pearls.
For a long time pearl considered being among
the precious materials, even today it can be found at cheaper price, it still
requires an oyster to produce it.
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| Crown produced from natural pearls. |
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| Black pearl and oyster. |
