Q.  Hi. I just had a question about being able to remove some water stains on a granite countertop. I worked in August on two tables, which are granite and the white, somewhat sparkly you know, on it. It seems like they were retaining the water... Read More

These white streaks may be hard-water deposits, which can prove very difficult to remove. Suggest that they try a sulfamic acid-based tile-and-grout cleaner. CAUTION Make sure to let them know to NOT use sulfamic acid or any acids on marble. Acid... Read More

Q. We have a new Calcutta Matarazzo Dolomite kitchen honed bench top. Only in use since Xmas Day 2025. We are seeing shiny streaks across the surface. Do we need to request the stonemason to return and repolish the surface, or can you advise of... Read More

It sounds like you may be using an improper cleaner in your mop water or you are using a dirty mop. Try switching to a daily cleaner specifically designed for marble flooring. Also make sure the mop is clean and that it is only used for the marble... Read More

Short of removing it and installing new grout I would try cleaning it with stone soap or neutral cleaner. Be sure to use a soft brush and scrub the grout lines throughly. If this does not throughly clean the grout you may need to replace it. TIP The... Read More

The streaking may be caused by any one of a number of problems. The mop you are using may be dirty. Use a clean string mop and make a point of only using it for the marble floor. Wring the mop out several times as you clean the floor. Are you using... Read More

It sounds as though your slate floor has a rough finish which catches the fibers of the mop as it is dragged across the floor. First, you need to deep-clean the floor to remove all dirt and grime. Next, apply a good-quality acrylic sealer. Several... Read More

Q. I recently washed the mirrors about the marble or granite tiles with vinegar. Now there are spots on the tiles. Is there a way to remove these? It feels a little rough on the top of the spots as if the coating came off a bit. What can I do? A. The... Read More

Q. We have a stain on our granite top caused by a bag of peaches. The bag leaked and caused a stain in the granite. What do we use to make a mix to remove the stain?  A. The discoloration on your granite may be a stain, or it may be an etch. The... 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