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The freshwater pearl mussel (Margaritifera margaritifera) is an endangered species of freshwater mussel, an aquatic bivalve mollusc in the family Margaritiferidae.. Although the name "freshwater pearl mussel" is often used for this species, other freshwater mussel species (e.g. Margaritifera auricularia) can also create pearls and some can also be used as a source of mother of pearl.
Chinese freshwater mussels were once grafted up to 50 times per shell, or 25 times per valve. This practice was common when the industry mussel was primarily the cockscomb pearl mussel (Cristaria plicata). This mussel produced a high volume of low-quality pearls that came to be known as "raisin pearls" in the 1970s and
A formal freshwater mussel fishing industry was established in the mid-1850s to take advantage of this natural resource. [17] The "pearl rush" to find freshwater pearls became so intense in some rivers that millions of freshwater mussels were killed in a few years. In some rivers and streams entire freshwater mussel beds were completely eliminated.
Nacre bracelet. The main commercial sources of mother-of-pearl have been the pearl oyster, freshwater pearl mussels, and to a lesser extent the abalone, popular for their sturdiness and beauty in the latter half of the 19th century.
Margaritiferidae is a family of medium-sized freshwater mussels, aquatic bivalve molluscs in the order Unionida. [1] [2] It is the most threatened of all unionid families.[3]The family is sometimes referred to as the freshwater pearl mussel family, [4] but "freshwater pearl mussel" more often applies to the species Margaritifera margaritifera.
Although most bivalves can create pearls, oysters in the family Pteriidae and freshwater mussels in the families Unionidae and Margaritiferidae are the main source of commercially available pearls because the calcareous concretions produced by most other species have no lustre. Finding pearls inside oysters is a very chancy business as hundreds ...
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