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Tuesday, February 26, 2019

Why is a necklace called a necklace?

The original Japanese cultured pearls, known as akoya pearls, are produced by a species of small pearl oyster, Pinctada fucata martensii, which is no bigger than 6 to 8 cm (2.4 to 3.1 in) in size, hence akoya pearls larger than 10 mm in diameter are extremely rare and highly priced.
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The most valuable pearls occur spontaneously in the wild, but are extremely rare. These wild pearls are referred to as natural pearls. Cultured or farmed pearls frompearl oysters and freshwater mussels make up the majority of those currently sold.
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A fisherman in the Philippines might have discovered the largest natural pearl ever found — and then kept it hidden under his bed for 10 years. The pearl's existence was revealed by Aileen Cynthia Maggay-Amurao, a tourism officer in Puerto Princesa, on the island of Palawan.Aug 24, 2016
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The Tooth Test: To find out if a pearl is real, lightly rub it against the front of your tooth — not against the edge, which can scratch the pearl. If natural or cultured, rather than simulated, the pearl should feel gritty.Nov 28, 2018
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A pearl is a hard glistening object produced within the soft tissue (specifically the mantle) of a living shelled mollusk or another animal, such as a conulariid. ... The most valuable pearls occur spontaneously in the wild, but are extremely rare. These wild pearls are referred to as natural pearls.
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Black cultured pearls from the black pearl oyster – Pinctada margaritifera – are not South Sea pearls, although they are often mistakenly described as black South Sea pearls. In the absence of an official definition for the pearl from the blackoyster, these pearls are usually referred to as "black pearls".
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The Tahitian pearl (or black pearl) is an organic gem formed from the black lip oyster (Pinctada margaritifera). These pearls derive their name from the fact that they are primarily cultivated around the islands of French Polynesia, around Tahiti.
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A pearl of this size and type is more like a one-in-a-million-clam find, he said. Pearls are not really Kathleen's style of jewelry, so they likely will sell the gem, which could retail for $3,000 or more, he said. "Which is not bad for a $15 bag of clams," she said.Dec 1, 2014
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Most freshwater cultured pearls sold today come from China. Saltwater pearls grow within pearl oysters, family Pteriidae, which live in oceans. Saltwater pearl oysters are usually cultivated in protected lagoons or volcanic atolls.
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The nucleus bead in a beaded cultured pearl is generally a polished sphere madefrom freshwater mussel shell. Along with a small piece of mantle tissue from another mollusk (donor shell) to serve as a catalyst for the pearl sac, it is surgically implanted into the gonad (reproductive organ) of a saltwater mollusk.
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