TIPS & TRICKS

CLEANING MARBLE
By Mike Loflin, Marble Institute of America
August 2022

A type of calcareous stone, marble is composed mainly of calcium carbonate, a chemical compound commonly found in natural stone, shells, and pearls. Marble is a soft, porous stone that is sensitive to staining, scratches, and acidic solutions.

For spills: Blot the spill with a paper towel immediately. Don’t wipe the area, it will spread the spill. Flush the area with water and mild soap and rinse several times. Dry the area thoroughly with a soft cloth.

For cleaning: Clean stone surfaces with a neutral cleaner, stone soap, or a mild liquid dish-washing detergent and warm water. Similar to any item cleaned in your home, an excessive concentration of cleaner or soap may leave a film and cause streaks. Follow manufacturer recommendations. Use a clean rag mop on floors and a soft cloth for other surfaces for best results. Rinse the surface thoroughly after washing with the soap solution and dry with a soft cloth. Change the rinse water frequently. In the bath or other wet areas, soap scum can be minimized by using a squeegee after each use. To remove soap scum, use a non-acidic soap scum remover or a solution of ammonia and water (about ½-cup ammonia to a gallon of water). Frequent or over-use of an ammonia solution may eventually dull the surface of some stone types. In outdoor pool, patio or hot tub areas, flush with clear water and use mild bleach solution to remove algae or moss.

Newly collected marble with chalcopyrite specimen from the CCGMS Feb. 4th Ellijay Field Trip. Photo by A. Rollason.
Cobb County Gem & Mineral Society