Q. Yellow flower petals from Arizona trees recently stained my outdoor limestone tiles. Is there a way to remove this type of stain? The yellow does not blend well with my light grayish tiles. A. It's a shame something natural and harmless like... Read More

Q. Grey grout stain has penetrated the surface of some of the ceramic wall tiles in our bathroom. It’s been a few weeks now, and I’ve tried scrubbing with water and a mild cleaner, but the stain is still there. Is it possible to remove... Read More

Q. I spilled some coffee on my tile, and it won’t come off. I tried floor cleaning solution, vinegar and water, vinegar and baking soda, watered bleach, and hydrogen peroxide. Nothing seems to work. I am pretty sure it is porcelain tile.  A.... Read More

Q. I have a problem with a marble tabletop and need to get some advice on what may have caused it. The marble has lots of spots plus a few ring-shaped marks. The marks cannot be cleaned off. The table was delivered in pristine condition. Is it... Read More

Q. I am about to purchase a beautiful slab of marble for my pool house. It is called Skyfall marble. It has blue, green hues with grey. The slab is covered with smooth white spots. The distributer said they are natural, but I can't find ANYTHING... Read More

Q. Water feature has chlorine residue buildup causing a white stain on natural rock waterfall. How can I remove the chlorine residue from the rock? A. What you are seeing is likely mineral deposits. Chlorinated water doesn’t cause the deposits,... Read More

Q. I have tried removing rust stains on these stone columns (on testing the base is limestone), and I believe the columns are the same? I've used a number of different branded products and oxalic acid but none of these have removed/lessened the... Read More

Q. I have an (intentionally) distressed marble seat in my shower. After years of use, there is a build up of white on top of it. How do I get rid of it? Thanks. A. What you're describing is likely soap scum, mineral deposits from hard water, or... Read More

Q. I am a project manager for an insurance company. I have a project at a post office that has terrazzo floors. It looks like there are long cracks that I assume follow a stress crack in the concrete below. I need to give the customer an idea what it... Read More

Q. We recently decided to use our small patio set, and we took it out of storage, and there is a broken bird a egg on the stone top. Obviously, this must have happened in spring. The contents of the egg is as hard as a rock. Is there a safe solution... Read More