Organisms such as oysters, the pearls?

Posted: 03 May 2011 01:00 PM PDT

tahitian black pearl earrings

4000 years ago, a Chinese man was hungry, so he opened some shells and feed has been set. E 'became the first man ever to be a pearl!

In the past, pearls were in many parts of the world are located. Today they are mostly in Bahrain and there are some reports of natural pearls of the Australian Indian Ocean.

The beads are made of calcium carbonate and cochiolin. It is assumed that a foreign body of the shell is finally in the pearl. For example,if a grain of sand in the shell, the shell, irritated by the intruder begins to cover the stimulation with calcium carbonate and conchiolin. Finally, grain of sand becomes a pearl.

If nature itself does everything the pearl can be round in shape. There are eight basic shapes. They can be round, half round, button, tear, pear, Baroque and circled. Sure, they are perfectly round and very rare for this reason, the most expensive. It was founda way to produce pearls, but they are never as beautiful as those from the wild.

In Japan, they have found a way to produce perfect pearls. It 's almost like surgery. It injects something into the body of oysters, while at the same time, they must be so careful not to damage the oysters.

The largest ever was 5 cm, with a circumference of 10 cm. You can only really valuable when it is in nature, but because they are very rare, most pearls are cultured orAnimals (from pearl oysters.) Pearls from the sea are more expensive than fresh water. Of course there are counterfeit, which in general are not very expensive.

In the development of cultured pearl oysters, some sort of starting to make colored pearls (they can be pink gold, Ries, or silk) However, more interesting is the black pearl the oyster manufactures. That this type of Pinctada margaritifera. They are called "blacksTahitian pearls, "as grown in Tahiti.

In the past, hunting was the only way to harvest pearls. Divers would dive to the seabed or river bed, and collect them. They had to check every single pearl, because not every oyster is a pearl in it. In fact, three tons of beads, pearls, only three or four.

Today Japan is the main center for pearl production. Retailers and wholesalers use Japanese Pearl WeightMomme measures required, and is pronounced "moh-Can" (1 corresponds Momme 3.75 grams). Read more about pearls and their formation in http://www.butwhy.com.au/how-do-oysters-make-pearls

Tahitian Black Pearl Earrings

วันพุธที่ 4 พฤษภาคม พ.ศ. 2554

Organisms such as oysters, the pearls?

Organisms such as oysters, the pearls?

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