Q. I have a Pietra Cardosa countertop. I was using a descaling chemical solution to clean an appliance and accidentally spilled some, leaving a handprint-sized discoloration. The black countertop has turned almost white in that area. If you have any... Read More

Q. How do I clean a yellow marble figurine to make it white again? I have tried marble cleaner to no avail. A. Your DIY methods will differ depending on how the marble turned yellow. One possibility is that the stone absorbed some sort of staining... Read More

Q. Hi - i need help identifying the type of stone on my countertop and the best materials to maintain/ care. A. Without an image or description of your countertop, we cannot determine what type of stone you have. Nevertheless, we will do our best to... Read More

Q. Can an impregnator be used to waterproof stone? A. Not exactly. An impregnator will make the stone water resistant, but it will not make it waterproof. Impregnating sealers are designed to penetrate the surface and fill the microscopic pores... Read More

Q. There are black mildew stains around the drain of my travertine sink. I was away when they appeared and had a house guest during that time using the bathroom. I don't know nor does she know how the stains got there. The sink was new. I did... 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 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. White Macaubus quartzite was installed yesterday and I noticed this "crack" when I hit gone from work and inspected it. Question is, is it a crack or fissure? When I run my nail over it, it does get caught. Just want to make sure I handle this... 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. 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