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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 ...
Tiny "seed" pearls (<2mm) occur commonly in all types of molluscs used for pearl cultivation, both ocean and freshwater, thus there has never been a need to find a way to cultivate tiny sizes. Japan Akoya pearl production generated large numbers of tiny keshi pearls, the value of which was mostly in the labor-intensive processing, so there is ...
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 ...
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.
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 ...
The River Tay, where the pearl was discovered. The Abernethy pearl, also known as the Little Willie pearl, is a 43.60-grain (2.825 g) freshwater pearl [1] named after William Abernethy (1925–2021), who discovered it in Perth, Scotland, in the River Tay in 1967. [2] [3] It is also known as Bill's pearl. [1]
Pearl jewelry stores may bleach or dye freshwater cultured pearls after harvesting to enhance their color. The most valuable baroque pearls are the South Sea and the Tahitian pearls , which are produced by Pinctada margaritifera (black-lipped oysters ) and Pinctada maxima (gold-lipped and silver-lipped oysters).
Margaritifera auricularia is a species of European freshwater mussel, an aquatic bivalve mollusk in the family Margaritiferidae, the freshwater pearl mussels.Formerly found throughout western and central Europe, the species is now critically endangered and is one of the rarest invertebrates worldwide, being confined to a few rivers in Spain and France.