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... Read More

  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... Read More

Q. Stain on white granite is plant food for flowers. Color of stain is blue. Have tried stone cleaner at least 3 time with no success. A. Blue stains from water-soluble fertilizer can be surprisingly stubborn on light granite. The color usually comes... Read More

Q. We had a quartzite counter island installed. The top was set flat on the cabinet, and there has been no movement. A crack appeared about one month after the installation. The crack goes opposite of the natural veining in the stone. There is a... Read More

Q. How do you remove rust stains from a terrazzo floor? A. Rust stains, or iron oxidation, on terrazzo can be frustrating, and sometimes, surprisingly complicated to remove. While Iron-Out or similar products can be used in a poultice to draw out the... Read More