Proper care and maintenance of natural stone can be a difficult and confusing process. The first step is always to remove loose debris with a vacuum (beater bar turned off) and dry/dust mop. From here there a multitude of effective products available to handle your specific need. Product examples include polish and sealant (for stone and grout), stain and mildew removal, and grout cleaning.
Please consult with a Renaissance Flooring representative if you need cleaning products or have a question about natural stone maintenance.
Natural Stone warranties vary with the manufacturer and specific type of stone. Check with your sales representative for the warranty that applies to your floor.