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Gemstones :: Pearl |
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PEARL : This is an Organic Gemstone, formed by
accident, without human intervention. It is formed inside a Pearl Oyster. One of
the most valuable gems in antiquity, pearls are highly valued. They are
evaluated according to size, colour, lustre, regularity of form, compactness. In
case of a number of pearls in a piece of jewellery, much depends on their
uniformity of colour or, at any rate, how well matched they are. A string of
pearls of equal diameter is worth much more than one consisting of pearls of
graduated diameters because numerous pearls of a uniform size are harder to
find. Even a pair of matching pearls is worth more than double the price of a
single pearl. Pearls have a pearly lustre.
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| Appearance
: Most pearls used in jewellery are roughly spherical, and this is
the most suitable for ordinary necklaces. Pearls may be somewhat irregular in
shape. The colour varies from white with a hint of gray to white with a
yellow tinge, but can also be silvery gray or more noticeably yellow. Pearls
have a pearly lustre. |
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| Occurrence
: Most Pearls harvested today come from China, Mississippi, South Sea
Islands, Strait of Mannar, Japan. Pearls from Persian Gulf have now exhausted. |
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| Substitutes : Plastic
or Glass coated and dyed. |
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| Chemical
Composition :
CALCIUM CARBONATE. |
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