Pearl: What is it? |
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Pearl: What is it?Pearl is probably the only gemstone that is used in jewelry as it is, without cutting. There are no two identical pearls in the world, they all are unique. In China, it is called gjen-dju, In India - "manjara (the flower), Greeks and Italians call it "margarites", English, German and French people call it "pearl", Russians - "gemchug" (is it derived from English "gem" or from Chinese "gjen-dju"? Who knows...) Pearl is a gem and in the same time - a biologically creates substance, produced by a mussel. These mussels are of different types, both freshwater and saltwater. Freshwater species live in the zones with mild climate, populating fresh (and clean!) springs, rivers and lakes of North America, East Asia and Far East. Due to the pollution, their number have dropped dramatically, so at the moment five of these species are protected by law. As for the saltwater ones, about 10 species, they live in tropical seas: the Red Sea, Persian Gulf, Ceilone (Shri-Lanka), Australia, Japan and Venesuella. How is the pearl produced? The natural (real) pearl is formed if the tiny grand of sand, or some other irritant, gets into the body of a mussel, or between its body and a shell. It can also be a reaction to the parasite. Pearl is simply a reaction of the mussel, an attempt to isolate the foreign object, to cover it with the mother of pearl (perlmutter), the same matherial that covers the inner side of a shell. With time, an object of spherical or irregular shape is formed. If you cut the pearl, you will see the core (the original grain of sand) and the rings - thin layers of aragonite (calcium carbonate), glued together with an organic glue - conhioline - produced by a mussel. The time that it takes to create a pearl, its color and other details is directly related to the outside conditions, like the temperature, quality of water and awailability of nutritions. The colot of a freshwater pearl is white, pink or mauve. Saltwater pearl can be black, white, yellow or gray. The size on a pearl of an average quality can be between few millimeters and the size of an egg of a pigeon. Extraction of natural pearl Freshwater pearl have beed known for centuries all around the world, from natives of North America to Russians. Russians, by the way, had the technology of extracting pearl without causing extensive harm to a population of mussels. All they used was... three baskets. The first basket (one without the bottom) they were using to take a closer look at the bottom of the river, edges of the basket "filtering out" the waves. When the mussel was found, they were placing it to the second basket, full of water. When the second basket was full, Russians were placing the mussels to the second basket, with the heated (not boiling! just warm) water. In the warm water, the mussel was opening its shell, and the catcher was able to take a look inside, without taking it out from the water. If there was no pearl inside, the mussel have been returned to the river. Speaking of Russian pearl. It is worth mentioning that in Russian Carelia it was silver-white or silver-blue, while in Lapland it was pink and sometimes black with metal tone. Most of this pearl have been sold to the Northwegian merchants, not to the Russian tsar. It was supplied either to the Europe or to the king of Northway. More to the south, the saltwater pearl was much more popular. The best quality was supplied from Persian Gulf, Red Sea, India and Japan. The one from the Persian Gulf was valued the most. Some little amount is still catched in Persian Gulf. Catching the natural pearl is a difficult and dangerous occupation. Catchers are collecting the mussels from the bottom of the sea in the special bag. Aboard their boat, they use a special knife to open the mussel, if lucky, they'll find one pearl in 30-40 mussels. Of course, after such a barbaric procedure, all 40 mussels die. Sometimes the fortune smile at teh catchers, and they find 2-3 pearls in one mussel, however, to find a high quality one, you need to go through thousands of mussels. Besides - where can we find that much, considering our ecological situation? Next: Artifficial Pearl
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