Second, powder crystals are most afraid of sun exposure, and long-term exposure will make them fade.
Third, opal is most afraid of water. Soaking opal in water may become transparent.
Fourth, amber beeswax is most afraid of high temperature. Never take a bath or sauna with you, it will cause cracks and rupture.
Fifth, gold and silver are most afraid of cosmetics, because most cosmetics contain mercury and lead, which will react strongly with gold and silver.
6. pearls are afraid of sweating. Remember to take off pearls when swimming, exercising and taking a bath, which will accelerate the change.