Contrary to popular belief, a natural pearls is notformed by a grain of sand. This story is an urban legend.
A natural pearl forms inside a bivalve mollusk when the shell has been invaded by a parasite or damaged. The most common reason a natural pearl will develop is due to parasitic invasion.
The parasite wil burrow through the periostracum layer (outer layer) of a mollusk shell and into the mother-of-pearl beneath. When the parasite penetrates the mother of pearl in comes in contact with the mollusk's mantle muscle. This muscle contains cells known as epithelial cells. These cells produce a substance called nacre which coats the inside of the shell (mother-of-pearl) and is the substance of which a pearl is composed.
The parasite becomes lodged in this mantle muscle and dies. The mollusk's definsive reaction is to grow a sac around the intruder. This sac is called the pearl sac. Once the sac encases the intruder the cells begin to deposit nacre- which is composed of aragonite and calcite (a calcium carbonate compound) platelets.
Cultured (marine) pearls are grown by inserting a rounded bead of mother-of-pearl and a piece of mantle tissue containing epithelial cells from a donor mollusk into the gonad, or reproductive organ, of a host mollusk. The donor tissue grows into a pearl sac around the bead. As in natural pearl production, this sac then deposits nacre.
Maturity time of artificial oyester pearl
An oyster pearl
In fact every clam, not just the oyster, can make pearls. Pearls are made because of a tiny bit of dirt, sand or whatever, comes inside the clam. The clam then makes 'mother-of-pearl' which is a substance that makes a pearl after a pretty long time.
In Australia, the Sydney Rock Oyster, Pacific Oyster and Native Oyster.
The word oyster is used as a common name for a number of distinct groups of bivalve molluscs which live in marine or brackish habitats. The valves are highly calcified. Some kinds of oyster are commonly consumed by humans, cooked or raw. Other kinds, such as pearl oysters, are not.
to make a pearl a grain of sand first has to get in the oyster.
The oyster/pearl oyster lives in the bathypelagic zone of the ocean.
yes but they do not have near the qualite as a pearl oyster
Yes, you have to kill the oyster before taking out the pearl it has formed.
A diver might find a pearl in a oyster
Pearl is produced by an oyster to protect itself from something that got inside its shell. It secretes nacre, which becomes pearl. Cultured pearls are made by placing a "seed" inside of the oyster shell, and letting the oyster work. Over time, the oyster will deposit nacre onto the seed, forming a pearl.
They can be found almost any shelled mollusk such as the pearl oyster
it's a lab made pearl from oyster shells