Until people were able to culture or counterfeit them, pearls once outshone diamonds as the most valuable gems. Today, real and imitation pearls are affordable enough to use as accents on crafts, fashion jewelry, and embroidery projects as well as in fine jewelry. The selection of pearls online includes everything from vintage jewelry to pearl beads ready for stringing into new pieces.      Pearls come from oysters or mussels, so unlike other gems, they are a renewable resource. Most mollusks form pearls, but only those from certain species of oysters and mussels have the luster and iridescence that makes them valuable.     Types of Pearls  Natural Pearls  Cultured Pearls   Freshwater Pearls  South Sea Pearls  Akoya Pearls  Tahitian Pearls    Imitation Pearl Beads   Plastic Pearls  Glass Pearls    Pearl Quality  Shapes of Pearls   The soft-bodied creatures cannot escape from irritants that find their way into the animals' shells, so they protect themselves by coating the offending ...
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