All pearls are soft and can scratch easily, so always store them separately from your other jewelry and remove them before working or applying makeup. Wipe cultured pearls after each wearing with a clean, soft cloth. Occasional cleaning with warm soapy water is fine, but avoid ultra sonic cleaners. Have a jeweler check cultured pearls about once a year to make sure they are snug in their settings. Diamond Diamonds are very hard and will scratch other jewelry, so it is best to store them in their own area.
Mechanical cleaners are safe, unless the diamond has fractures or is fracture-filled.
If that is the case, avoid heat and chemicals. Ammonia-based cleaners or milk solvents are fine, and warm soapy water is always safe and effective. Emeralds exposed to prolonged heat or intense light may dry out or fracture. Remove emerald jewelry before working, and store it carefully in a place separate from your other jewelry. Garnet Garnets are sturdy but some varieties can chip, so it is always a good idea to remove them before working or handling harsh chemicals.