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QUESTION-TYPE BASED TESTS
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TEST 1 – The Pearl
A.
The pearl has always had a special status in the rich and powerful all through the history. For
instance, women from ancient Rome went to bed with pearls on them, so that they could remind themselves
how wealthy they were after waking up. Pearls used to have more commercial value than diamonds until
jewellers learnt to cut gems. In the eastern countries like Persia, ground pearl powders could be used as a
medicine to cure anything including heart diseases and epilepsy.
B.
Pearls can generally be divided into three categories: natural, cultured and imitation. When an
irritant (such as a grain of sand) gets. inside a certain type of oyster, mussel, or clam, the mollusc will
secrete a fluid as a means of defence to coat the irritant. Gradually, layers are accumulated around the
irritant until a lustrous natural pearl is formed.
C.
A cultured pearl undergoes the same process. There is only one difference between cultured pearls
and natural ones: in cultured pearls, the irritant is a head called ‘mother of pearl’ and is placed in the oyster
through surgical implantation. This results in much larger cores in cultivated pearls than those in natural
pearls. As long as there are enough layers of nacre (the secreted fluid covering the irritant) to create a
gorgeous, gem-quality pearl; the size of the nucleus wouldn’t make a difference to beauty or durability.
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