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NO THEY DO NOT!

For a start they are not semi-precious gems.

For another thing they are not there to be collected or despoiled but left in place, undisturbed, for genuine cavers and show-cave visitors to admire.

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12y ago

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Related Questions

What rhymes with lamb that means shellfish?

It is a clam.


Do Clams Make Pearls?

Pearls grow in pearl-producing mollusks. Natural pearls occur when a mollusk's mantle tissue becomes damaged either by parasitic intrusion or damage to the shell. The mantle contains epithelial cells, which are responsible for the nacre deposition on the inside of the shell. If these cells become dislodged when the mantle is damaged, they may continue to deposit nacre within the body of the mollusk, creating a pearl.A grain of sand neverproduces a pearl. This is a myth.


Do the Swarovski pearls from the Bridal affordable jewelry set come from the same place as the Swarovski crystals?

Yes, the same company makes the pearls as the crystals.


Can you put a mussel or clam in the same tank as baby turtles?

No, a mussel or clam cannot be put in the same tank as a baby turtle. Baby turtles, as well as adult turtles will eat mussels and clams.


Does a clam reproduce sexually or asexually?

Clams have sexual reproduction. A male clam releases his sperm into the water at the same time that a female clam releases her eggs into the water. Somehow the male and female clams know how to do it at the same time and somehow the sperm and the eggs get together.


What color pearls can you get?

While white, and more recently black, saltwater pearls are by far the most popular, other color tints can be found on pearls from the oceans. Pink, blue, champagne, green, black and even purple saltwater pearls can be encountered, but to collect enough of these rare colors to form a complete string of the same size and same shade can take years.


Do oysters produce pearls?

Pearls are smooth crystalline calcium carbonate and can form in many species of mollusk. However, the large spherical jewels are formed in "pearl oysters" (pearl mollusks of the family Pteriidae), which are a different family from the edible oyster. There are two methods by which pearl-producing mollusks produce pearls. Neither of these methods involve a grain of sand, although this is a common misconception.Natural Pearls = No Human InterventionNatural pearls are produced when the shell of a mollusk is invaded by an intruder, most often a boring parasite. The intruder makes its way into the mantle tissue of the mollusk. This tissue has special nacre-secreting cells known as epithelial cells. These cells form a sac around the intruder (pearl sac) and begin depositing a calcium carbonate substance known as nacre. Nacre is the building block of pearls.Cultured Pearls = Human InterventionCultured pearls are produced in both saltwater mollusks and freshwater mussels. The process involves coaxing open the shell, and in the case of saltwater mollusks, making a small incision on the reproductive organ and inserting into this incision a rounded bead made of freshwater mussel shell and a small piece of mantle tissue from a donor mollusk. The same process of natural pearl production then takes place.In the case of cultured freshwater pearl production, incisions are made to the mantle organ of the mussel, up to 16 on either side of the valve, and small pieces of donor mantle tissue are inserted. This is followed by the same process of natural pearl production.----------Although clams can produce "pearls", they are non-nacreous and have little commercial value. Mollusks from the family Bivalvia are the producers of pearls. There are 8000 different species of which only approximately 20 will consistently produce pearls.Clams that do produce pearls likely produce them in a similar fashion as pearl-producing mollusks, by the invasion of a parasitic worm or other organic intruder - NOT a grain of sand. That is an urban legend.The edible oyster is not a pearl producer and the term "pearl oyster" is a misnomer. The correct scientific term would be pearl mollusk.


Who owns The Drunken Clam?

Horace did until he died (Season 11 | Save the Clam)Jerome (Season 8 | Jerome is the New Black) bought it at the end of the same episode.


What is the difference in natural and cultured pearls in jewelry sets?

Natural pearls are found in the wild, and therefore more rare, cultured are grown in a far, both look almost exactly the same.


What two factors determine a pearls worth?

The short answer is that it depends on the variety of pearl. Traditionally, the Akoya-type pearl has been valued for it's potential for excellent luster, which cannot generally be achieved without good nacre. But other varieties of pearls, like South Sea White and South Sea Golden pearls, rarely, if ever achieve the same luster as Akoya-type pearls, but they can be very large, which typically makes them more expensive. They do have more problems with roundness and surface blemishes, since the oysters that host them have larger adductor muscles. They can and do they impart larger and more visible characteristics on the surface of the pearl. For these pearls, blemishes affect value more.


How do clam mate?

One clam opens it shell. Then the next. Then the male clam sticks it "tongue" in the female clams mouth. Then the female and male shut their shells. Then they start to do a "dance" Then they release their shells and continue as normal.


On clubpenguin how do you find the rare treasure in aqua grabber in clam waters?

In aqua grabber you go down to the huge clam and get a rock that is the same shape as the pearl. Grab the rock and put it into the clam's mouth and then grab the pearl!! and to find the rock with a star...go to a small clam and wait above it until it sleeps. then once its mouth is all the way open you can GRAB it very quickly and you will automaticaly have it.