Ultrasonic cleaners use cavitation to remove dirt from metals and hard gemstones. They're effective for solid gold, platinum, and durable gems but can damage pearls, opals, emeralds, and plated or glued jewelry. Inspect pieces first, use mild soap, short cycles, and consult a jeweler when unsure.
Modern home jewelry cleaners (ultrasonic or electrochemical) restore shine quickly and without abrasives, but you should avoid porous, treated or antique pieces and follow manufacturer and jeweler guidance.
A professional jewelry cleaner restores shine, inspects for loose settings, and handles repairs that home cleaning can't. Learn about tools (polishers, buffers, ultrasonic), which pieces need special care, and what to expect from a jeweler.