Since freshwater pearls are very rare,
they are difficult to make and because of this have a high value. That's because everything is left to nature. As such, maybe it's not too hard to understand why freshwater pearls, in spite of its imperfections, are still incredibly more expensive than the best cultured pearls.
To produce them is similar to any other pearl creation.
It starts with the seldom process that tiny object finds its way into the oyster, if
the oyster can't get rid of it tries to isolate the subject by secreting nacre, that the material a pearl is made from. With pearl farming this process got under control and with the right water temperature and pampering the oyster in the right way a pearl will be found after sometime.
The pioneer in pearl creations and farming have been the Japanese,
after they made cultured pearls from saltwater mussels they tried to do the same with freshwater. They were successful and by surprise they found that this pearls came in colors never found in from saltwater creations.
After some years China was able to handle this too by learn and try they even started to get better results as the Japanese masters. Far bigger resources on land and manpower plus lower sales prices made them able to penetrate the market quick. They even come in colors the Japanese couldn't produce.
To care about the freshwater pearls
keep in mind that they have a rather soft surface and are prone to be damaged when put together with other jewelry, so it needs to keep them separately and the best is to wrap them into a cloth.
Another subject is the pearl jewelry, let's say a necklace, is influenced by the natural acid level of the skin means, after a while luster will gradually get less, interestingly it's just the opposite as with other body decoration materials such as jade, to avoid this polish the object from time to time with a soft cloth and the object of desire will stay pretty and shine.
