CULTURED PEARLS

culturedpearlsNothing is quite as elegant as a classic strand of pearls against a black dress. But pearls today have such an exciting range of sizes, shapes and colours that make them ideal for a huge range of occasional jewellery.

Cultured pearls come in many beautiful colours from white to pale cream, eose and lilac, even gold green and black. This diversity is thanks to new producing countries, different variety of mollusks, and a new demand from ever discerning consumers who have made multicolour pearl strands as popular as traditional strands of white pearls.

Mankind has always admired pearls. In Persian mythology they are called “the tears of the gods.” and iIn some Muslim legends the pearl is God’s first act of creation.

According to ancient Chinese legend, the moon holds the power to create pearls, instilling them with its celestial glow and mystery. The ancient Greeks thought pearls were the dew from the moon collected by oysters that opened their shells as they floated on the sea at night.

Pearls are an organic gem, created when a mollusk like an oyster covers a foreign object with beautiful layers of nacre, the mother of pearl.

Pearls used to occurr only by chance, but today most pearls are cultured by man. A shell bead or mantle tissue is placed inside an oyster and the oyster is returned to the water. When the pearl is later harvested, the oyster has covered the bead or tissue with layers of nacre.

The cultured pearl industry began in Japan, with Akoya saltwater cultured pearls. A wardrobe classic, these lustrous white strands are still produced in Japan today but they are much more rare, as ocean pollution and the industrialization of Japan has made it more difficult to farm oysters in the coastal bays. Akoya cultured pearls are known for exceptional luster, due in part to the cold waters where they are grown.

Today the majority of the cultured pearls on the market, even traditional-looking white strands, are freshwater pearls cultured in China. Most freshwater pearls are nucleated with tissue instead of a round bead. This means the nacre is thicker but it means that most pearls are usually not perfectly round. China also produces freshwater cultured pearls in warm pastel pink, oranges, and purples.

In the warmer waters of the South Pacific, bigger mollusks produce South Sea cultured pearls and black Tahitian cultured pearls, which are larger, up to 20 mm in size. South Sea cultured pearls, white, cream, and golden in colour, are the world’s most valued pearls for their immense size and natural satiny luster. South Sea pearls are produced in Australia, the Phillippines, and Burma.

The popularity of Tahitian cultured pearls has exploded over the past decade. These natural coloured pearls are not just black: they are grown in an amazing range of colours, including pistachio, silver, eggplant, green, and charcoal, with shimmering iridescent overtones. Traditionally, pearl dealers had to slowly and patiently collect matching pearls from among the wide variety of hues to put together a matching strand. Today, multicolour strands that celebrate the variety of tones available are also very popular.

The quality of cultured pearls is judged by the orient, which is the soft iridescence caused by the refraction of light by the layers of nacre, and luster, the reflectivity and shine of the surface. Also look for any flaws or spots in the nacre: the best pearls have an even smooth texture. Other factors that affect value are the regularity of the shape, size, and colour.

Cultured pearls and natural pearls can be distinguished from imitation pearls by a very simple test. Take a pearl and rub it gently against the edge of a tooth. Cultured and natural pearls will feel slightly rough, like fine sandpaper, because of the texture of natural nacre. Imitations will feel as smooth as glass because the surface is molded or painted on a smooth bead.

Because pearls are organic, they have a relatively low hardness of 2.5 to 3.5 and should be stored away from other jewellery to prevent scratching. Always put on perfume and sprays before you put on pearls, since chemicals may be absorbed into pearls, staining them. Wipe clean with a moist soft cloth.


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