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Wow! That is a stunning ring! I love the blue topaz with the pearl!

Tahitian Pearls Defined Tahitian pearls are bead-nucleated pearls grown in the gonad of the Pinctada margaritifera mollusk in French Polynesia. Tahitian Pearls - Among the Most Beautiful in the World Tahitian pearls are produced in the black-lipped oyster Pinctada margaritifera, in and...

Cultured Pearls Defined A cultured pearl is any pearl grown with the influence of human intervention. Cultured Pearl Formation A pearl is formed when a something penetrates or lodges in the mantle tissue of a mollusk. In response, a substance called nacre is secreted, and the creation of a...

Those are different flaws and wouldn't preclude the pearls from export. Now I have to find one to post a photo. It might not be until the next trip though.

Saltwater Pearls Defined A saltwater pearl is a calcium concretion (can be nacreous or non-nacreous) produced by a saltwater mollusk that lives in a saline/marine environment. These pearls can be either natural (no human intervention in its production and a product of a fishing operation) or...

Pearl-Producing Mollusks (Pearl-Producing Bivalves) Mollusks represent one of the world's earliest forms of animal life, and date back over 550 million years. Actual pearl-producing mollusks first appeared 530 million years ago, when mollusks developed shells. The scientific discoveries of pearl...

Cortez Pearls Defined Cortez pearls are pearls grown in the "Rainbow Lipped Pearl Oyster" or Pteria sterna from the waters of the Gulf of California -or Sea of Cortez- in Mexico. The History and Comeback of Cortez Pearls Emerging once more from the clear waters of the Gulf of California, after...

Scallop Pearls Defined A scallop pearl is a non-nacreous calcareous concretion produced by any member of the Pectinidae (scallop) family. Pectinids are known for their uniquely blue colored "eyes" (actually, known as simple-eyes) found in their mantle and for their ability to "swim" using their...

Natural Pearls Defined Natural pearls are calcium carbonate secretions which form within mollusks without human intervention. Natural Pearls Accidents of Nature Natural pearls are formed randomly and really are simple accidents of nature. When a certain type of irritant, such as a parasite...

Melo Melo Pearls Defined A melo melo pearl is a non-nacreous, natural calcareous concretion produced by the marine volute gastropod melo melo. Melo melo shell (from Wikipedia) Melo Melo Pearls are Non-nacreous or "Porcelaneous Pearls" The melo melo "pearl" does not come from an oyster or...

Conch Pearls Defined A Conch Pearl is a non-nacreous, porcelaneous pearl produced by the "Queen Conch" (Lobatus=Strombus gigas). "Conch pearls" -also known as "jellybeans" in the trade- often exhibit a unique flame-like pattern due to their concentrically arranged calcium carbonate platelets...

Abalone Pearls Defined Abalone Pearls are natural pearls found in the gastropod mollusk Haliotis. The shells and pearls are most often an iridescent blue color, and the most common shape for pearls are baroque and "horn". Abalone Shells from Mexico and the United States Abalone Pearls: Some of...

South Sea Pearls Defined A South Sea pearl is pearl produced by the Pinctada maxima mollusk. They are currently cultured in areas throughout the Indian and Pacific Oceans, primarily in Australia, the Philippines, Indonesia and Myanmar. South Sea Pearls - Among The Largest In The World South...

Mabe Pearls Defined A Mabe pearl is a worked and assembled blister pearl (attached to the shell). It is typically of hemispherical shape and is grown against the inside of the oyster's shell, rather than within its soft tissues. Natural blister pearls are commonly found in nature. Cultured Mabe...

Keshi Pearls Defined A keshi pearl is a non-beaded pearl formed by accident, as a by-product of the pearl culturing operation. Akoya Keshi Pearls How Keshi Pearls Are Formed Keshi pearls are formed when the oyster rejects and spits out the implanted nucleus before the culturing process is...

Akoya Pearls Defined Akoya pearls are bead-nucleated cultured pearls produced in the Pinctada fucata martensii and Pinctada fucata chemnitzii primarily in Japan, China, Vietnam, South Korea and Australia, with most production (>95%) taking place in Japan. The Classic Pearl Renowned for their...

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Freshwater Pearls Defined Freshwater pearls are pearls which grow in non-saline environment in freshwater mussels. Freshwater Pearl Grading There currently is no internationally recognized grading standard for freshwater pearls. Every system in use is subjective and unique to the company or...

The Pearl Necklace comes in many Sizes and Colors The "classic" piece of pearl jewelry is, of course, the pearl necklace. Akoya pearls are the most traditional type of pearl used in necklaces, but freshwater pearls, Black Tahitian pearls, and large South Sea pearls are also used, often to...

Natural's posts have been moved to a new thread "Various Natural Pearls" as they are off the Nautilus topic and deserve their own page. https://www.pearl-guide.com/forum/showthread.php?t=8174