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  1. My new marble floor has a white powder on it. It cleans up with water, but keeps coming back. Is there anything I can use to clean it off permanently? This is a common condition, especially if the floor is new. When the marble is installed, it is set in a mortar base that is wet. As the moisture evaporates, it carries with it dissolved salts which are deposited on the surface of the stone. This con... Read More
  2. Powdery residue on limestone despite many washings Q. Our installer grinded off the top layer of our limestone floor and since then we have repeated powdery residue on limestone despite numerous washings and sealings/impregnatings. Why is this and can this be fixed as I don't want to have white ... Read More
  3. Efflorescence - Removal and Prevention   Efflorescence - Removal and Prevention   By Frederick M. Hueston www.stoneforensics.com The crystallization of soluble salts in Historic masonry causes severe deterioration of the substrate. This crystallization is called subfloresc... Read More
  4. Efflorescence - Removal and Prevention Efflorescence - Removal and Prevention By Frederick M. Hueston www.stoneforensics.com The crystallization of soluble salts in Historic masonry causes severe deterioration of the substrate. This crystallization is called subflorescence. These salt... Read More
  5. Stone Myths Stone Myths By Frederick M. Hueston www.stoneforensics.com Over the past 20years I have heard many stories about the reasons stone will fail, turn color, fade or what ever. Many of these stories are funny and almost all of them are just plain fals... Read More
  6. Identifying the Cause and Cure For White Powdery Substance On Coquina Tile Q. I just bought a house with coquina tile that has not been cleaned in decades. We contracted a limestone expert (after interviewing 4 companies, 2 of which were not familiar with what coquina tile was) to clean them. They ground the floor and then ... Read More
  7. White Build-up on Marble 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 ride of it? Thanks. White residue on the top of stone can be attributed to several things. ... Read More