A comparison study was made between the yellow and white nacre of the gold-lipped Pinctada maxima oyster shell and 65 yellow cultured pearls.
Read MoreThis study demonstrates how atypical absorption features, particularly in the blue region of the spectrum, can be used to positively identify colour treatment.
Read MoreThis article reviews the history of the conch "pearl," discusses S. gigas and its fisheries, and examines the gemmological properties and other characteristics of this attractive material.
Read MoreBlack pearls have been found in Mexico’s Gulf of California since the area was settled more than 2,000 years ago.
Read MoreAlthough the Pinctada margaritifera oyster usually is associated with the black pearls cultured in French Polynesia, it also can produce attractive large yellow cultured pearls.
Read MoreSeveral pearl-in-chicken cleaning experiments are carried out to test the validity of recipes from an ancient Egyptian source.
Read More
