Normal maintenance :
All stones flooring should be dust mopped as necessary to remove debris and dirt. A dry non-treated dust mop is to be used. Normal maintenance involves periodic washing with clean, potable water and neutral (pH7) cleaners. Soapless cleaners are preferred because they minimize streaking and filming. Mild phosphate-free biodegradable liquid dish-washing soaps or powders or stone soaps are acceptable if rinsing is thorough. 

Wet the stone surfaces with clean water. Using the cleaner solution (following the manufacturer’s directions) wash in small overlapping sweeps. (Work from the bottom up if it is a vertical surface.) Rinse thoroughly with clean potable water to remove all traces of soap or cleaner solution. Change the water in the rinse pail frequently. Dry with soft cloth and allow to thoroughly air dry.

DO dust mop floors frequently.
DO clean surfaces with mild detergent or stone soap.  
DO thoroughly rinse and dry the surface after washing
DO blot up spills immediately.
DO protect floor surfaces with non-slip mats or area rugs. 

DON’T Use cleaners that contain acid such as bathroom cleaners, grout cleaners or tub & tile cleaners.
DON’T Use abrasive cleaners such dry cleaners such as dry cleaners or soft cleaners.
DON’T Mix bleach and ammonia; this combination creates a toxic and lethal gas.  
DON’T ever mix chemicals together unless directions specifically instruct you to do so.