Q&A for How to Clean Onyx

You want to use a minimum amount of cleaning solution. Don't apply it directly to the countertops—instead, apply a little bit to your cloth and then wipe the countertops down. Onyx is porous, and the appearance will change if it absorbs too much liquid.

You want to use something that's not abrasive. A microfiber towel or even a soft tissue would work.

No, you should not use a Mr. Clean Magic Reach pad (or the standard Magic Eraser) to clean a natural onyx shower pan.

Persistent mold in low spots, even with daily wiping, often indicates that the mold has developed a deeper "root system" within porous grout or caulk and requires a more potent, long-contact treatment.

You should clean your black onyx and gold jewelry with a gentle wash using a mild soap solution and a soft cloth or brush. Onyx is a porous and delicate gemstone, so you must avoid harsh chemicals and abrasive materials.

That can cause etching and pitting. The acetone in the remover can damage the stone by breaking down its components, making it fragile. Etching creates deep, hard-to-repair damage, while pitting appears as tiny holes. If this occurs, you must act quickly to prevent further damage.

Onyx is highly resistant to water and stains but is susceptible to damage from paints that do not adhere well or are not moisture-resistant. Consider acrylic latex paint for its quick drying time and excellent adhesion to onyx surfaces, as it is resistant to moisture and suitable for bathroom environments. Oil-based paint also provides a hard, smooth, and durable finish, making it perfect for high-moisture areas, though it requires a longer drying time and has a stronger odor. For added durability and easier cleaning, a semi-gloss or gloss finish is resistant to moisture and suitable for onyx vanities. Regardless of your choice, be sure you clean, sand, and prime the onyx vanity to create a smooth surface for better paint adhesion.

Yes, water can potentially damage onyx if not handled properly, as onyx is a porous stone that can absorb liquids. This absorption can lead to discoloration, cloudiness, or even cracks. When cleaning, you should avoid soaking onyx in water and always dry it thoroughly after exposure. For general cleaning, use gentle, pH-balanced solutions and avoid harsh chemicals.

First, clean the affected area using a pH-neutral cleaner and a soft cloth, avoiding vinegar or citrus-based products. Next, apply a marble polishing powder, such as oxalic acid or MB-11, to the spot and gently buff it in circular motions with a damp microfiber cloth. Afterward, rinse the area clean with water, and dry thoroughly. Always test any product in a hidden area first to be sure it does not damage the marble. If the marks are too severe, you should consider bringing in professionals, as improper use of polishing compounds can worsen the damage.

To make onyx shine, you can use specific polishing pastes such as Cerium Oxide or Diamond Paste. Apply a small amount of the chosen paste and rub gently with a soft cloth until a shine appears. Alternatively, a mixture of olive oil and white vinegar can restore luster, or for regular maintenance, use a mild soap solution. Always avoid abrasive cleaners and harsh chemicals to protect the onyx.

To clean an onyx table and address rough marks, you will need a soft cloth, a pH-neutral cleaner, and a stone polishing compound for minor scratches. For deep damage, professional restoration may be required.

To remove tape residue and glue from an onyx bookend, start with a gentle, non-acidic solvent like cooking oil, which breaks down adhesives effectively. Onyx is a porous stone that can be damaged by harsh chemicals, so it's crucial to proceed with caution.

Unplug the lamp and remove the shade, if applicable. Mix a solution of warm water and mild, non-abrasive soap, avoiding harsh chemicals. Use a soft cloth to gently clean the lamp stand. Rinse the cloth and wipe again to remove soap residue, then dry thoroughly. Optionally, apply mineral oil or furniture polish to maintain shine.

Make a paste of baking soda and water. Let it sit for 15 or 20 minutes, then scrub, rinse, and dry thoroughly. If that doesn't work, you may need to use a stone polisher.

You can try polishing the onyx sink to help remove stains. Look for a stone polish specifically for natural stones like onyx or marble.

Try using a soft cloth dampened with a 50/50 mixture of white vinegar and water, rinse well, and dry with a clean, soft cloth.

Bleach usually works with steel wool pad or you can use baking soda and vinegar. If you use baking soda and vinegar, put the vinegar in to a spray bottle and spray it to the area you want to clean, then pour baking soda on top and let it stay there for at least 5 minutes. After five minutes wipe off the rest with a sponge or a paper towel. If the stain isn't gone by then do it again until it's gone.

That depends on what type of countertops you have. When in doubt, use a very mild cleaner, perhaps diluted.