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Tahitian cultured pearl
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The Tahitian pearl is improperly called black pearl, 'poe rava', black being only one of its many possible shades. Its common official name is 'Tahitian cultured pearl' but its appearance is very variable, both by its color (aubergine, gray, water green, navy blue ...), its shape (elongated, rimmed, round, baroque ...) and its size that can range from a few millimeters to 0.5in (1.4cm).
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