where do  pearls and diamond come from?
820100
1. pearls are made because of an irritation to the oyster inside the shell. the irritation is then covered by the oyster w/ calcium carbonate & after many years it is now a pearl.  a diamond is made from carbon from decaying plants & animals buried in the ground for  millions of years then subjected to immense pressure of the earth to form a rock-hard diamond.\n\n2.  you mean sea water? sea water is too salty w/ at least 3.5% salinity making it undrinkable for humans.\n\n3. the fish dont 'see' using their eyes.  they use a variety of organs to find their way in the water.  when you look at a fish, they have a line running through the middle of the body up to the tail. it is a sensory organ used by the fish to ' see'.  others have acute sense of smell or taste like the sharks.  others have a rostral organ in their snout w/c acts like an electrical field receptor.\n\n4. maybe women because the current world record holder in the free diving catergory is a woman named streeter who can hold her breath for 6 min while diving to 525 feet.
152870
Natural pearls are formed more or less randomly, when some sort of irritant becomes lodged in the tissue of an oyster or mollusk. In response to the irritation, the oyster secretes nacre, a combination of calcium carbonate and organic substances, which gradually builds up in layers around the irritant. Over a period of several years, this build-up of nacre forms a pearl.\n\nThe size, shape, and color of the pearl are determined by a combination of factors, including the size and shape of the original irritant, whether the mollusk is living in salt or freshwater, and the geographic region where the mollusk lives.\n\nNatural pearls of any commercial value or desirability are extremely rare. Instead, since the early part of the 20th century, cultured pearls have supplanted natural pearls as the most common and available pearls.\n\nCultured pearls are still actual pearls, grown organically inside of oysters in the same way as natural pearls. The difference is that, in the case of cultured pearls, the pearl farmer intentionally stimulates the development of the pearl by inserting a "nucleus" into the oyster. Thus, the formation and discovery of the pearl are no longer left to chance.\n\nNatural pearls today tend to be found primarily in older jewelry from estate sales, auctions, and so forth -- in other words, existing pearls rather than new ones. However, some natural pearl beds are being increasingly harvested, including beds in the Persian Gulf area and freshwater natural pearls in the United States.
516485
one makes pearls... the other we eat...\nname one bob and the other bob # 2
753150
Here are some sites that may help you:\n\nhttp://www.sheikhmohammed.co.ae/english/history/history_pearl.asp\nhttp://en.wikipedia.org/wiki/Pearl_hunting\nhttp://www.divingheritage.com/pearldivingkern.htm
1027564
Not all pearls are spherical.\n\nPearls are formed when a piece of sand or grit gets trapped inside an oyster's shell.  To prevent this from irritating the oyster's soft tissues, the oyster covers it in layers of a smooth white substance, adding layer upon layer.  As more layers get added, the lump becomes larger and smoother, eventually creating a pearl.
321588
The precious stones are diamond; some forms of corundum (ruby, sapphire, Oriental emerald, Oriental topaz, and Oriental amethyst); and emerald. The chief semiprecious stones are aquamarine, amethyst, topaz, garnet, tourmaline, spinel, peridot (see olivine), zircon (see zirconium), chrysoberyl, quartz, opal, turquoise, moonstone, and jade. The organic gems are pearl, amber, coral, and jet; of these, pearl is usually counted as a precious stone.\n\n=)
46390
This is strait from the book, My book "Gemstones of the World " by Walter Schumann.\n  The cutting of the colored stones is called lapidary work; the cutter is known as a lapidary. This can be the cutting of all types of stones and gems, from semi presious stones ( ie: turquoise )to the most pressious stones ( ie:Dimonds ) some times lapidary is refered to as a " gem cutter " or "stone cutter" but these are lossly used turms. \nUse the library for further reserch. A person that sells or deals in gem stons is a " gemalogist "
1040344
Diamond origin can not be determined yet by a lab, so unless you are buying directly from the mine, you can not be sure the diamond is actually from that location.  They are now laser inscribing canadian diamonds to try and tag the diamond so you know it's from there, but they can easily be polished off.  Every step a diamond takes to get to a jewelry store adds more money to the price of the stone, so the closer you buy the stone from when it was mined, the cheaper it will be.
508159
Check out:\n\nhttp://en.wikipedia.org/wiki/Diamond
402812
You could try this link: \n\nhttp://www.vistapearls.com/about_us.asp\n\nIf you scroll down the home page, you'll see an offer of a pearl care booklet that comes in a silky Asian pouch to fit into your jewelry case.
939259
Best Answer - Chosen by Asker\n\nBlack diamonds were introduced by debeers around 1989/90 at the nec spring fair (jewellers trade show). They were a way of using industrial diamonds (grey,brown,white but severly flawed,through to black, usually reserved for drills, tools, abrasives). They sorted the pure black ones, and cut them into jemstones, like regular diamonds. They never really took off, and, because of the black being patchy within the rough stone, there were only small gemstones cut, containing only the uniform dark black areas, of the rough stone. Now with pink diamonds becomming popular (these are usually colour enhanced by radiation) small uniform colour diamonds of different colours are popular. By small we mean in use in pave' setting ("encrusted effect") channel setting of eternity rings, Bling style words/names as pendants, encrsted with small stones. So now, the new "black" diamond is trendy! You will never really see one as a large single stone in a solitare ring. Diamonds, of all sizes naturally occur in differnent "hughes" (rather than bold colours) and a popular yellow hugh is called a canary diamond. Good flawless colour commands higher prices than white, of the same quality. An off shade, (grey, or ununifrorm colour) lessens the price. The "hope" diamond which was featured in the titanic film (it never really was on board in real life, a bit of romance, based on an actual diamond) is 45 carats and the pure blue of a light sapphire, dark blue topaz, only more so! A proccess has now been achieved, to grow in a lab, proper diamonds, that show as genuine on all heat dispese testing equipment as used by retail jewellers. They are chemically, Diamonds. These can be created in any uniform colour by adding metal oxides during growth of the crystal. these must be labelled as created diamond. NB. they are not c.z, or any of the shopping channel simulants. They are not cheap either, compared to c.z, but comparitevly so compared to natural, mined diamond.
1125500
Most teeth used in jewelry are fossilized teeth obtained from mining sites, river beds, and diving expeditions.  Plenty of shark teeth wash ashore on beaches all over the world, but I don't think that's where the majority of the teeth for jewelry comes from.\n\nYou can perform a Yahoo! search for "shark teeth jewelry" and find many commercial sites that post their sources for shark teeth.  Here are a few examples:\n\nhttp://www.jtssharksteeth.com/\nhttp://www.themissinglink.biz/about.asp
1117242
The Gemological Institute of America has a training and certification program for Diamonds and gems.  You might want to start, by working in a jewelry store or by taking some art classes.  Also check out the Lapidary Journal magazine and other trase magazines for information about gems.
239323
sand comes from shells and coral,finely broken over time. And from fish ingesting coral and excreting it as sand.
1182862
Diamonds and coal have the same basic component, carbon.  Diamonds have been turned into their current form due to extreme pressure and temperature.  Diamonds come from diamond mines, not coal mines.
176040
Pearl is used for 30 years in most traditions.
1013582
I sell pearl jewelries on ebay, and I get my items wholesale from the Philippines.\n\nI got my sources not on the Web though, but actually traveling and meeting with suppliers and checking the quality and workmanship of their products. I went to the Philippines and scoured for possible suppliers (I had contacts who helped me identify suppliers).\n\nYou will have a hard time looking for a reliable supplier from Asia on the Web. One of your main problem will be quality of the item. They can show you a good photo but what is shipped to you may not necessarily the same quality; or quality will be so inconsistent that one necklace would be ok while the other looks so bad.