How to Clean a Black Onyx Ring

By Marie Mulrooney

While black onyx does exist naturally, it's very rare. As a result, most commercially available "black onyx" is actually agate that has been stained black. Whether you've got a genuine black onyx ring or a stained agate ring that was labeled as black onyx, the cleaning process is the same. You should avoid using any cleaning agents on the ring, even a mild soap, because they may accumulate in the porous stone and discolor it over time.

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Step 1

Dampen a cotton cloth in water and wring it out so that it's moist, not wet.

Step 2

Wipe the onyx portions of the ring clean with the damp cloth.

Step 3

Dry the onyx portions of the ring carefully with a clean, dry cotton cloth.

Step 4

Polish any metal settings or elements in the ring with a jewelry polishing cloth, taking care not to polish the onyx portions of the ring.