GIA 12.52 ct. Natural White Quahog PearlQuahog pearls (pronounced KO hog) are extremely rare organic gems produced naturally by the bivalve clam, Venus mercenaria or Mercenaria mercenaria. Quahog pearls are found by fishermen off the eastern coast of the United States, typically in the New England region, where clams are harvested for their delicious meat for use in popular dishes such as clam chowder. It is estimated that only 1 out of every 100,000 quahog clams will produce a pearl of any