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  2. Pearl - Wikipedia

    en.wikipedia.org/wiki/Pearl

    Therefore, the pearl industry is making ongoing attempts to improve culturing techniques so that keshi pearls do not occur. All-nacre pearls may one day be limited to natural found pearls. [16] [17] [18] Today many "keshi" pearls are intentional, with post-harvest shells returned to the water to regenerate a pearl in the existing pearl sac.

  3. List of bivalves of Hawaii - Wikipedia

    en.wikipedia.org/wiki/List_of_bivalves_of_Hawaii

    Natural history and evolution of Cryptopecten (a Cenozoic-recent pectinid genus). University of Tokyo Press. Hayami, Itaru; Kase, T. (1993). Submarine Cave Bivalvia from the Ryukyu Islands: systematics and evolutionary significance. Tokyo: University Museum, University of Tokyo. OCLC 30660037.

  4. Tahitian pearl - Wikipedia

    en.wikipedia.org/wiki/Tahitian_pearl

    The most valuable of these are of the darker variety, as the naturally dark tones of the Tahitian pearls is a unique quality among pearls. Because of their darker hues, Tahitian pearls are commonly known as "black pearls". [3] A true black Tahitian pearl is extremely rare, and largely considered one of the most beautiful kinds of pearls in the ...

  5. This is TODAY: Everything you need to know about our ... - AOL

    www.aol.com/news/today-everything-know-iconic...

    NBC’s TODAY is a news program that informs, entertains, inspires and sets the agenda each morning for Americans, starting at 7 a.m. Want to know more about hosts Savannah Guthrie, Craig Melvin ...

  6. Pearl hunting - Wikipedia

    en.wikipedia.org/wiki/Pearl_hunting

    In Asia, some pearl oysters could be found on shoals at a depth of 5–7 feet (1.5–2.1 meters) from the surface, but more often divers had to go 40 feet (12 meters) or even up to 125 feet (38 meters) deep to find enough pearl oysters, and these deep dives were extremely hazardous to the divers.

  7. Pinctada - Wikipedia

    en.wikipedia.org/wiki/Pinctada

    Black South Sea pearls, or Tahitian pearls come from the black-lip oyster; gold and silver South Sea pearls from the gold-lip and silver-lip oysters; and Akoya cultured pearls from Pinctada fucata martensii, the Akoya pearl oyster. Pearls are also obtained in commercial quantities from some species of the closely related winged oyster genus Pteria.

  8. 50 Of The Most Fascinating, Stunning And Dangerous Natural ...

    www.aol.com/100-most-incredible-stunning-strange...

    Nacreous clouds, also known as "mother-of-pearl" clouds, are high-altitude clouds that form in the stratosphere, typically at altitudes of 15 to 25 kilometers, and are most commonly observed in ...

  9. Pinctada mazatlanica - Wikipedia

    en.wikipedia.org/wiki/Pinctada_mazatlanica

    Pinctada mazatlanica is found in the eastern Pacific Ocean from Baja California Sur to Peru, including the Gulf of California. It is also widespread in the Galapagos Islands. [4] These pearl oysters live in shallow water from 3 to 30 meters (4 to 99 feet) deep on coral reefs and rocky bottoms. [2]