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 MoreChinese freshwater cultured pearls (FWCPs) are assuming a growing role at major gem and jewellery fairs, and in the market at large.
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The history of Baja California has been closely tied to the exploitation of pearls since the 16th century.
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.
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There has been considerable debate in the gem trade concerning the nucleation procedures being used to grow large round Chinese freshwater cultured pearls.
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 MoreThe successful culturing of abalone pearls has been known since French scientist Louis Boutan’s experimentation in the late 1890s, but commercial production has only been achieved in recent decades.
Read MoreHistorically, natural black pearls have been one of the rarest and most exotic of gem materials.
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