Treated gems often require special handling. Avoid ultrasonic cleaners, steamers, and harsh chemicals on fracture-filled or oiled stones, as fillers may dissolve or discolor. Heat-treated gems are generally stable but should not experience sudden extreme temperature changes.
Store jewelry separately to prevent abrasion. Clean most pieces with mild soap and lukewarm water using a soft brush. Professional inspection and re-oiling (for emeralds) may be needed periodically. Following care instructions provided with laboratory reports preserves appearance and structural integrity.