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A New Conch Pearl Treatment Can Damage Pearls

Michael Krzemnicki, director of the Swiss Gemmological Institute (SSEF), is warning the jeweler trade about a new, artificial unstable resin coating that is damaging conch pearls when applied. The damage done to the pearls is devastating and practically irreversible. Upon examination of some contaminated pearls, Krzemnicki noticed that the pearls were covered with whitish crust. […]