Wednesday, June 11, 2008

Beautiful Diamond Jewelry


Diamonds Jewelry is expensive because they are rare

FALSE! There are enough diamonds in the world to fill a cupful for every man, woman, and child in the planet. The reason they are so expensive is because strict controls are placed on the quantity of diamonds produced for sale worldwide.

Ok, then why would I buy a diamond?

A diamond is truly a wonderful symbol of commitment and love; with the right care, a diamond ring will last a lifetime. Diamonds are forever associated with engagement and marriage in our culture. It's hard to find anyone wearing an engagement ring without a diamond nowadays. However, diamonds also come in many other beautiful jewelry designs, including earrings, bracelets, necklaces, and pendants.

Diamond Earrings make your honey likes princess, Modern, popular, and remarkably eye catching. The princess cut's brilliant and fiery square shape has a cosmopolitan flare that is simply irresistible and perfect for today's modern fashions Diamond Studs.

You can find Bracelets Diamond .The luxury of brilliant diamonds and breathtaking gemstones set in gold and platinum. A luxuriously elegant and timeless jewelry accessory also Luxury and elegance exude from this glorious diamond tennis bracelet. A river of dazzling diamonds .

So, if you want to purchase diamond jewelry from online shopping. You find right place now. The jewelry is really great! I have not seen a company with better quality on their diamond jewelry. The price of the Diamond earrings, pendants, necklaces, and bracelets was very competitive. Diamonds aren't just for engagement rings. Diamond earrings, pendants, necklaces, and bracelets are all excellent gifts for a spouse, girlfriend, mother, or any important woman in your life.

Tuesday, June 03, 2008

Salt Water pearl

Pearls form within oysters, which live in the sea, and also within freshwater mollusks. Traditionally, most pearls were gathered from saltwater-dwelling oysters in the Persian Gulf, the Red Sea and the coastal waters of India and Japan, although China has harvested freshwater pearls for many centuries.

Saltwater pearls tend to be more lustrous than their freshwater counterparts, thereby increasing their desirability and value.

All saltwater pearls produced today are bead-nucleated pearls. Natural pearls are still collected in the Persian Gulf, but the yield is too small to account for any market value, and the pearls collected rarely leave the area.

Saltwater pearls are cultured by taking an oyster and prying it open a mere 2-3 centimeters. A technician then uses a special instrument to make a minute incision on the gonad (reproductive organ) of the oyster. A small nucleus is inserted into this hole, and a tiny piece of mantle tissue is placed behind it. The epithileal cells in this mantle tissue grow around the nucleus producing a pearl sac. This is where the pearl grows. This process is the same for all saltwater pearls cultured today.

The three most common types of saltwater pearls are Akoya pearls, Tahitian pearls, and South Sea pearls

Fresh Water Pearl

The Japanese, at Lake Biwa, are credited with being the first to succeed in cultivating freshwater pearls on a commercial basis, although freshwater pearls in the shape of Buddha had been cultured in China as far back as the thirteenth century. The technical roots of cultivating freshwater pearls are attributed to Masayo Fujita, the "father of freshwater pearl cultivation".

The first harvest of Biwa pearls was in August 1925 and they had a shell bead nucleus like Akoya pearls. By the 1930's they were being sold overseas. Some merchants from India would buy these Lake Biwa pearls from Fujita and then resell them to the Middle East as highly valuable Persian pearls for huge sums of money. One day, it was accidentally discovered that a shell bead is not necessary for the cultivation of a freshwater pearl. All that is needed is the insertion of a piece of mantle (a membranous tissue which secretes nacre and lines the inner shell surface of mollusks). This is a lot less trouble than inserting both a bead and mantle tissue. Also, it was noticed that after the first harvest, mussels can spontaneously grow pearls a second and third time. What this means is that cultured freshwater pearls usually have more pearl nacre than cultured Akoya pearls because most do not have a shell bead nucleus.

Pearls that are cultivated using just mantle tissue are called tissue-nucleated pearls in America and non-nucleated pearls in Britain and Commonwealth countries. When a shell bead is implanted along with a graft of mantle tissue, the resulting pearl is called a nucleated pearl or a head­nucleated pearl (The bead can be any shape; it isn't necessarily round). The general term for any pearl cultivated in a lake, pond or river area is freshwater cultured pearl. For the sake of brevity, this book usually omits the word "cultured" since practically all pearls today are cultured.

Biwa pearls (pearls from Lake Biwa) have enjoyed a great deal of prestige. This is because they tend to have a smooth surface and a high, even luster. Unfortunately, production almost came to a halt in the early 1990's due to the death of most of the Biwa mussels. It is now being resumed. Some dealers still have old stocks of pearls from Lake Biwa to sell, but many pearls which are identified as Biwa pearls are actually from China.

Most freshwater pearls today are produced in China. Their quality has been steadily improving since 1991 and their sizes have been increasing. At the end of 1992, semi-round Chinese freshwater pearls made their appearance on the market and now offer an attractive, lower priced alternative to the round Akoya pearls. Some of the larger pearls are even becoming alternatives to South Sea pearls.

China and Japan are not the only places where freshwater pearls are found. There are many historical accounts about the natural freshwater pearls of Europe and North America. These pearls are still being sold, but in decreasing quantities. Overfishing, flooding and pollution has either dwindled or, in some areas, eliminated the supply of these natural pearls.