"Caring for Stone Floors"
Scripps Howard News Service (12/08/08) Friedmann, Rosemary Sadez

Floors made of marble, granite, quartzite, or limestone should not be cleaned with vinegar or any acidic cleanser that will etch or scratch the stone. These types of floors also should not be subjected to re-crystallization or vitrification to restore luster, as such treatments also contain acid. Stone contains calcium carbonate, and mixed with acid, the bond between the calcium and carbonate is broken. The resulting film is calcium fluorosilicate, which clogs the stone's pores, prevents moisture from escaping, and causes rot. To get rid of etches and scratches and restore shine, waxes, acrylics, urethanes, re-crystallization, or vitrification must be removed. An impregnator should be applied, which forms a seal against water, coffee, and other liquids while still allowing the stone to breathe. As for daily maintenance, stone floors need only be dry mopped on a daily basis, and all spills should be blotted, rinsed with water, and blotted again.
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