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  1. How Do Oysters Make Pearls? - HowStuffWorks

    Aug 30, 2023 · It is commonly believed that pearls are formed when a grain of sand enters an oyster; however, this has recently been disputed as a myth.

  2. Pearls: Where Do They Come From and How Are They Formed?

    Aug 19, 2025 · The rarity of natural pearls led to the development of cultured pearls, a process that involves human intervention to initiate pearl formation. Cultured pearls are genuine pearls, formed …

  3. How Pearls Are Formed - Prins and Prins Diamonds

    5 days ago · Pearls are formed through patience, time, and nature’s quiet precision. From the moment an oyster protects itself by laying down layers of luminous nacre, a pearl begins to take shape. This …

  4. How Pearls Form and Which Species Makes Them - ThoughtCo

    Aug 28, 2019 · Pearls are made when mollusks trap something inside and cover it with layers of nacre. Pearls can come from many mollusks, but are often made by oysters and mussels. The pearls you …

  5. How Do Oysters Make Pearls? - Encyclopedia Britannica

    Nov 7, 2025 · To protect their bodies from irritants, mollusks secrete the same minerals and proteins, which then attach to the object and build up in roughly concentric layers that form a pearl.

  6. The True Story Behind How Pearls Are Made - Smithsonian Magazine

    Aug 5, 2021 · By collecting and analyzing nacreous pearls, scientists can learn more about how mollusks create these shiny gems and how that biological process could change as Earth’s waters …

  7. How Pearls are Made - The Pearl Source

    Freshwater pearls are primarily produced by mussels in rivers, lakes, and ponds. China is the leading source of freshwater pearls. Saltwater pearls are formed by oysters and are typically found in the …

  8. How do oysters make pearls? - Natural History Museum

    Pearls are made by marine oysters and freshwater mussels as a natural defence against an irritant such as a parasite entering their shell or damage to their fragile body. The oyster or mussel slowly …

  9. How Do Pearls Form? - International Gem Society - IGS

    Aug 17, 2024 · How Do Pearls Form? Do pearls form around grains of sand trapped in oysters? Learn the facts about pearl formation and the various mollusks that create these organic gems.

  10. How Are Pearls Made: 7 Fascinating Facts to Explore

    Pearls are stunning gems that form naturally. They are made by an intriguing process that begins with an irritant inside a mollusk and ends with the mollusk covering it in layers of nacre, which is that …