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  2. John Latendresse - Wikipedia

    en.wikipedia.org/wiki/John_Latendresse

    John Robert Latendresse (July 26, 1925 in South Dakota – July 23, 2000) [1] was an American collector, known for being the "father of American cultured freshwater pearls". [2] He left home at 13, and lying about his age, joined the U.S. Marines at 15, serving 38 months in the South Pacific during World War II .

  3. Cultured freshwater pearls - Wikipedia

    en.wikipedia.org/wiki/Cultured_freshwater_pearls

    Cultured freshwater pearls are pearls that are farmed and created using freshwater mussels. These pearls are produced in Japan and the United States on a limited scale, but are now almost exclusively produced in China. The U.S. Federal Trade Commission requires that farmed freshwater pearls be referred to as "freshwater cultured pearls" in ...

  4. Pearl farming industry in China - Wikipedia

    en.wikipedia.org/wiki/Pearl_farming_industry_in...

    Pearl farming in China is mainly concentrated in the southeastern part of the country, with the waterways of Zhejiang province serving as the source for China's freshwater pearls. [1] Production has greatly increased through the 1990s and 2000s, with China, according to Times Online , producing 90% of pearl necklaces globally. [ 1 ]

  5. List of pearls by size - Wikipedia

    en.wikipedia.org/wiki/List_of_pearls_by_size

    The Pearl of Lao Tzu for a long time thought to be the largest pearl, but claims about its size and much of its history were found to be fabricated by a conman by the name of Victor Barbish. [2] Other pearls like the Centaur Pearl, most likely the largest gem pearl at 856.58 carats (171.316 g), have just recently emerged from private ...

  6. Cultured pearl - Wikipedia

    en.wikipedia.org/wiki/Cultured_pearl

    The cultured pearls on the market today can be divided into two categories. The first category covers the beaded cultured pearls, including Akoya, South Sea, Tahiti, and the large, modern freshwater pearl, the Edison pearl. These pearls are gonad-grown, and usually one pearl is grown at a time. This limits the number of pearls at a harvest period.

  7. Unionida - Wikipedia

    en.wikipedia.org/wiki/Unionida

    Cultured pearls have a similar color to natural pearls as the nacre is laid down by the mantle of the freshwater mussel, and thus the color of the pearl may be species specific. Exportation of freshwater mussels for the use in the Japanese cultured pearl industry has supported the North American freshwater mussel fisheries since the late 1950s.

  8. Pearl - Wikipedia

    en.wikipedia.org/wiki/Pearl

    Tahitian pearls, frequently referred to as black pearls, [19] are highly valued because of their rarity; the culturing process for them dictates a smaller volume output and they can never be mass-produced because, in common with most sea pearls, the oyster can only be nucleated with one pearl at a time, while freshwater mussels are capable of ...

  9. Annular cutter - Wikipedia

    en.wikipedia.org/wiki/Annular_cutter

    An annular cutter (also called a core drill, core cutter, broach cutter, trepanning drill, hole saw, or cup-type cutter) is a form of core drill used to create holes in metal. An annular cutter, named after the annulus shape , cuts only a groove at the periphery of the hole and leaves a solid core or slug at the center.

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