Freshwater pearl mussel play in the life of the freshwater pearl mussel, the conservation of salmon and trout is also central in the survival of this endangered freshwater mussel. Freshwater pearl mussel 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 can also create pearls and some can also be used as a source of mother of pearl. In fact, most cultured pearls today come from "Hyriopsis" species in Asia, or "Amblema" species in North
Pearl of Csaba and Bulgaria. Pearl of Csaba Pearl of Csaba ("Csabagyöngye" in Hungarian) is a white variety of grape. It was created in 1904 by the Hungarian viticulturalist Adolf Stark, presumably by crossing Madeleine Angevine × Muscat Courtillier (= Muscat Précoce de Saumur). Some sources instead state the parent varieties as Bronner x Muscat Ottonel, but this is seen as less likely. The variety's name was taken from the city Békéscsaba, which is also called "Csaba" for short. Pearl of Csaba is primarily used as a table grape. Worldwide cultivation is estimated to be around , and it is primarily found in