Opal care: Opal is a soft stone and is prone to drying out and cracking if improperly treated. Chemicals including hair products, dyes, oils, cleaners, perfumes, lotions, and chlorine should be avoided while wearing your opal jewelry. Keep your opals cool and out of hot sunlight so they don’t crack and get discolored from too much heat. Your opals need to breathe - they should not be kept in a closed box. Clean with care: gently wipe them down with a soft, damp cloth after wearing to clean off any oils or residue and rehydrate them.