Use your naked eye for examining the pearls for scratches, pits or discoloration. Check the pearls for luster. Good pearls look shiny and appear as if lit from inside. They reflect light better as compared to flawed pearls.
Study the orient of pearl. The orient means the colored glow on the surface of the pearl. Check the color of the pearl. Pearls having their natural color tend to be more expensive than the dyed pearls. The overtone of the pearl is either warm pink or a cool blue.