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Step-by-Step Instructions for Cleaning a Jetted Tub: Remove bath residue once a month by filling the bath with hot water and ¼ cup powdered dishwasher detergent. Run the water jets for 10-15 ...
P. margaritifera in particular produces gray or black pearls. The benthic ecology of the region is a significant factor in the rate of production and the quality of pearls. Rocky, gravelly bottoms and low silt concentrations are preferable, and currents are necessary to keep the water clean with fresh phytoplankton and removal of fecal matter ...
Podura aquatica, the water springtail, is a species of springtail, one of only four described species in the family Poduridae. It is an abundant species with a Holarctic distribution. As its common and scientific names suggest, this is an exclusively aquatic species, living its whole life as a scavenger on the surface of all kinds of still water.
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.
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 ...
Natural black pearls are rare, with black pearls having a body color that may be assessed as silver, silver blue, gold, brown-black, green-black, or black. [20] Black cultured pearls from the black pearl oyster – Pinctada margaritifera – are not South Sea pearls, although they are often mistakenly described as black South Sea pearls. In the ...
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.
Pinctada maxima produces South Sea pearls in colors ranging from white, silver, champagne, gold. Pinctada margaritifera produces South Sea pearls commonly referred to as Tahitian pearls or black pearls which in fact come in color hues including gray, platinum, charcoal, aubergine, and peacock. Currently south sea pearls are cultured primarily ...