Producing a 3 to 5 millimeter nacreous pearl ... white to black — including blue, green, orange, pink, and yellow. The main factor that determines the color of pearls is the shade of the oyster ...

The interior shell, called the nacre, of most oysters is usually a glossy white or silver but the Tahitian black-lipped oyster features a thick band of black. If the pearl forms near that band ...

An impoverished fisherman is in line for a major payout after finding a rare orange Melo pearl worth £250,000 on a beach in Thailand. Hatchai Niyomdecha, 37, was picking up shells with his family ...

151; -- A Virginia Beach woman who picked up a couple bags of clams from a seafood shack was shocked when she discovered a rare, purple pearl inside one of the clam shells. "I bit down on it and I ...