After the pearl turns yellow. Even with dilute ** soak, there are some remedies. So it can dissolve the yellowing shell, and make the pearl reproduce the brilliant crystal color and glorious luster. However, if the color becomes very strong, the color of the pearl that will be difficult to reverse is beautiful. Pearls will become ordinary yellow, but they will not withstand long tests. Usually after several decades. At the same time losing the beautiful pearl luster, this is the old saying goes Why do pearl jewelry yellow for a long time? This is mainly because the physical properties of the aragonite minerals that make up the pearls are not stable. It will become ordinary calcite. Wen Shi combined calcite, a long time. Although the chemical composition is the same, its crystalline form and gloss are not the same. This is why pearls change color.
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