The question of what kind of oysters have pearls is a common one among pearl collectors. The answer, as it turns out, is not a simple one. For starters, there are two kinds of oysters, black and white. Then, there are about a hundred and fifty varieties of oysters in the wild that can be classified as oysters.
To complicate things still further, there are many different kinds of oysters that can be kept as a pet. And, if you ask any experienced or even amateur pearl collector, he will probably tell you that keeping a number of different kinds of oysters in a large oyster tank is absolutely essential for good quality hobbyists. If you just keep your oysters as stock, you might as well just be keeping a bucket with water in it.
As it turns out, pearls come in all sizes and shapes and even varieties. A pear is a bony growth on a hard oyster shell that can be very solid but soft inside. Pearls are made from bracts of living tissue that grows inside oysters. Pearls are formed when a foreign object gets inside the oyster and starts to grow.
Pearls, like clams, are made by living things. The oyster will first form a hard cover inside the oyster and close off the opening. It will continue to grow through the course of the day and as it grows, it will push against the shell and make the soft tissue inside bulge out. The result is a pearl, a string of pearls. There are about 400 different kinds of mollusks that produce pearls. The most commonly known kind of pearl is the Akoya pearl, which is black in color.
The question of what kind of oysters have pearls has been answered by scientists for decades now. Some species can be identified as originating from vehicles of nacre, which is the interior layer of the oyster shell. Other species can be identified as originating from nacre along the edge of a strand of teeth. A pearl that has originated from the innermost layer of an oyster can still appear to have a pearl because its surface is not entirely smooth.
Because pearls grow in different stages of development, it is not completely clear what each species produces. The most common type of pearl to be found in freshwater oysters is the strand pearl, which is formed at the beginning of a mollusk’s life. strand pearls are round and are usually white or transparent.
There are other pearls types that can be found in saltwater mollusks and in certain tropical species. In these species, the mollusk creates pearls on the ocean floor when the creature molts. After this occurs, the mantle shifts to form a new pearl. Sometimes, the mollusk will create a single pearl out of numerous pearls that have been growing in the area. In some cases, when the mollusk is injured, it may release several pearls in a short period of time.
Some species of mollusks do not grow any pearl during molting. They do not molt and their growth is stunted, causing them to continuously produce pearls. These pearls, which are larger than those that would be expected to come from a single pearl, are known as black pearls. Knowing what kind of oysters have pearls is important to understand their value and how to care for them properly.
Black pearls are formed from mollusks that are oversized. They grow larger and the mollusk will put on a single pearl after molting. Unlike other varieties, black pearls are formed with open spaces rather than closed pouches. These spaces allow light to shine through the oyster so the pearl will appear darker. Unlike other pearls, the black variety is rare and valuable.
There are several other kinds of mollusks that also produce pearls. The two most common are the white and the black varieties. These creatures differ slightly in the way that they grow. A white mollusk does not grow to become a pearl, instead it sheds its skin multiple times in a year. Once the animal sheds its old skin, it grows a new one. This increases the chances of pearls being produced.
Some mollusks do not grow any pearls at all. These creatures are called the crescent mollusks and they only produce a black color when they are young. As they get older, they change colors to become a variety of brown and pink. Knowing what kind of oysters have pearls will help you determine if you have a special species of mollusk in your waters.