Quahog Pearls Classification
White, Beige, Brown, Black, Purple, Lavender
Cohog And Quohog
Appearance, RI, birefringence blink and magnification. A "tooth test" is commonly used in which a pearl is rubbed against a tooth; if gritty, this is an indication that the surface is nacre, versus plastic and glass imitations that feel smooth.
Quahog pearls were used as trade goods by Native Americans. They are produced by the bivalve clam Venus mercenaria or Mercenaria mercenaria. Most prized specimens are the lavender and purple shades.