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Q. I'm a park educator (park naturalist) working at a fossil site in Canada. I'm putting together sets of fossils for use in classrooms, including some Green River fish fossils, which are in very soft limestone that flakes in delaminates... Read More

Q. My pickling vinegar bottle (7 percent acidic) leaked on my flagstone (limestone?) floor. I made a paste of baking soda and applied after washing the floor with Marbalex stone floor cleaner. I let the paste sit for the afternoon to no avail. I... Read More

Q. I have a Limestone tile and someone let the polish dry in the grout. How can I remove the polish from the grout? The grout was not sealed. The product was granquartz stone polish. A. Try applying a neutral cleaner to the grout where the polish... Read More

Customize Your Silicon Impregnator Application Methods Different types of natural stone have unique properties, so restoration and protection methods will vary from one stone to the next. When it comes to silicon impregnators, here’s what you... Read More

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