Freshwater pearl a kind of handmade jewelry that comes from freshwater mussels. rather than the oyster that live in the sea. generally, people think that freshwater pearls are rice-shaped, but in fact they are in all shapes, including round. round freshwater pearls are the rarest, so it is  desirable and most valuable shape. It is difficult to choose the perfectly round pearls that similar size and color to match for a pearl strand necklace, this is why matched strands are more expensive than the other types of pearl jewelry necklace.  
  
Bridal Jewelry is fashion jewelry that gap between fine freshwater pearl jewelry and costume jewelry. Sterling silver jewelry and Gold Jewelry are an example of Bridal Jewelry .

what is Natural pearls and Cultured Pearl:

Cultured Pearl - Like natural pearls, cultured pearls grow inside a living organism.Cultured pearls, by contrast, are those in which humans insert mother-of-pearl beads or other shapes into a mollusk. but The depth of the nacre coating depends on how long the beads are left in place before being harvested.

Natural pearls - those pearls are formed in nature, they begin as accidental intruders to the shell. it is more or less by chance. it actually inserting a foreign object into the oyster or mollusk, pearl farmers can induce the creation of a pearl.

follow are some care tips: ( http://www.bjbead.com)

pearl jewelry can last for generations. Although they have a low hardness compared to gemstone jewelry, the density of pearls makes them  durable. But pearls are perishable. Substances like vinegar, hairspray, perfume,inks, and others can damage the nacre. you'd better take off the pearl jewelry when  showering, and put on pearl jewelry  after makeup, perfume and hairspray have been applied. Unlike a gemstone, the pearl jewelry cannot be polished; once the surface is damaged, it cannot be restored to its natural beauty.

Store your handmade pearl jewelry in a  box away from other gems for that could rub against their surface. rub them with a soft cloth To clean the pearls.  you can use a non-abrasive cleaner such as hand soap.

Let your pearls air dry fully before  wearing them again.It may be necessary to have your pearl bracelet or pearl necklace  restrung if worn frequently.