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Graffiti Removal Procedure for Stone, Masonry, and Tile Surfaces By Frederick M. Hueston, www.stoneforensics.com If your beautiful building, wall, or other surface has just become the unintended canvas for graffiti, your first reaction might be to... Read More

All silicon-based impregnators should be tested first in an inconspicuous area. We have found that certain limestones and an occasional granite will become permanently dark. Apply the impregnator and wait at least 24 hours before making a... Read More

Both granite and marble make excellent counter tops, depending on the counter’s intended use. Marble is sensitive to acids, which can make it difficult to keep polished in a kitchen. Granite, by contrast, is acid-resistant, and can make an... Read More

The best cleaner to use for removing grout residue from a granite floor is sulfamic acid. Sulfamic acid is sold as a grout cleaner and works well on granite surfaces. Do not use on marble or limestone since the acid will etch these surfaces. Sulfamic... Read More

The answer is yes and no. There are several books available that show types of marble, granite, limestone, slate etc. but, there is no one book that shows all the stone available. There are somewhere near 9000 types of stone in the world. There is... Read More

Granite is much harder than marble. The hardness of stone is measured on a scale of 1 to 10. Ten is the hardest mineral. Diamond is a ten. Most marbles fall in the 3-5 range and granites fall into the 7-8 range. A simple test to determine if you are... Read More

No. Most marble, with the exception of certain limestones, cannot be flamed. The mineral make up of marble will not allow the surface to become flamed. Trying to do so will only burn the surface. FYI If you come across an unknown stone surface and it... Read More

Q. What are those white dots on my white marble?   A. This article, by Frederick M. Hueston, Stone Forensics, provides the answer.Have you ever wondered what those white dots are on white marble? You sometimes see thousands of them in high... Read More

Q. We have a tumbled travertine (unsealed) stone floor in our shower. I really need to know how to deep clean this floor, as it has gotten bad - a bit scummy, mildewy, and moldy. How should I clean my shower floor? Can you help? A. Keeping your... Read More

Q. We have a new home with black limestone in the master bathroom shower. I am looking to make a DIY cleaner for routine cleaning of the stone. Do you have a recipe or suggestion of products to use to make the cleaner? A. DIY cleaners can be... Read More