Pearls, Nature's Precious Gems from the Sea. Despite their vibrant colors and smooth shapes, pearls are actually made from the same material as the cliffs that surround them. Pearls, spines of sea urchins, the shells of clams, snails, and oysters, even coral—all these structures are made of the same compound: calcium carbonate. However, pearls are truly natural wonders created by the forces of nature. So, what exactly is an oyster? Furthermore, how do oysters produce pearls?
What are the odds of finding a pearl in an oyster?
The odds of finding a pearl in an oyster are relatively low. On average, it is estimated that only about 1 in every 10,000 wild oysters will contain a pearl. However, it's important to note that not all oysters have the ability to produce pearls. Only certain species, such as the pearl oyster, are known to form pearls. Additionally, the likelihood of finding a pearl in a cultured oyster is higher, as these oysters are intentionally implanted with irritants to stimulate pearl formation.
How long to oysters live?
Oysters have varying lifespans depending on their species and environmental factors. Generally, oysters can live anywhere from 5 to 20 years. Proper environmental management and conservation efforts are crucial to ensure the longevity and sustainability of oyster populations.
What do oysters eat?
Oysters are filter feeders, meaning they obtain their food by filtering microscopic organisms from the water. They mainly feed on phytoplankton and zooplankton, which are tiny algae and small marine animals floating in the water.
How Do Oysters Make Pearls?
The process of pearl formation in oysters begins when an irritant, such as a grain of sand or a parasite, enters the oyster's shell and comes into contact with the mantle tissue. In response to this irritant, the oyster's mantle tissue secretes a substance called nacre, also known as mother-of-pearl.
Layer by layer, the oyster coats the irritant with nacre, gradually forming a pearl. Nacre is composed of calcium carbonate crystals and organic proteins, giving the pearl its lustrous appearance. As the mantle continues to secrete nacre, the layers accumulate and the pearl grows in size and shape.
How Are Cultured Pearls Formed?
The pearl farmers insert an irritant inside the oyster shell or the mollusk’s shell manually, usually a shell bead nucleus. From there, they feed, care for and nurture the mollusks, keeping them safe from environmental conditions as well as predators. If not, they will not be able to successfully make pearls that are valuable to the market.
Cultured pearls are nurtured by pearl farmers on pearl farms instead of in the ocean
The irritants used to activate the nacre in cultured oysters are manually inserted by the pearl farmers
Pearl oyster divers have depleted the seas of the precious gems. These days, it’s almost impossible to find the gemstones in the ocean’s blue. Cultured pearl farms make it possible to “create” the gems by not having to dive for oysters.