how to distinguish dye colour pearls and mimic pearl products
General color of pearls do not have to change color, but if see black ash, black pearls, attention should be on the alert for its rare, as may be stained. As far as is known, pearls add to silver nitrate soaked in the solution, removed after the sun drying on strong, that is, become black. Published: Friday 01 August, 2008
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