Is an ultrasonic cleaner safe for all rings? Edited

Safest home method: warm water, a drop of Dawn, 20 minutes soak, soft toothbrush on the underside, pat dry. Skip toothpaste, skip paper towels (they scratch). Do this every 2-4 weeks and your ring will look new.

Steam and ultrasonic work by dislodging grease and skin oil. They are safe for hard, non-porous stones. Never on pearls, opals, emeralds, or stones with glue settings. That is why your jeweler asks what stone you have first.

I keep my silver in zip bags with chalk inside. It sounds ridiculous but it absorbs sulfur. My silver has stayed shiny for over a year without polishing.