Colour-treated brown Tahitian cultured pearls, known in the trade as “Chocolate Pearls”, have become increasingly prevalent in the market.
Read MoreThis study demonstrates how atypical absorption features, particularly in the blue region of the spectrum, can be used to positively identify colour treatment.
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Treated cultured pearls with a “chocolate” colouration have entered the market from several sources.
Read MoreSeveral pearl-in-chicken cleaning experiments are carried out to test the validity of recipes from an ancient Egyptian source.
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