You do not need to diagnose your floor before contacting us. Tell us where the problem appears, whether it followed a spill and how it looks after routine cleaning. A mark that changes the reflection can need different work from residue that sits on the surface.
Limestone is commonly sensitive to acids. An acidic spill can etch the surface, leaving a dull or pale area without necessarily creating an absorbed stain. A stain is discoloration from a substance; etching changes the surface. The same spill can cause both.
That distinction matters to the scope. Cleaning addresses soil and residue. Surface damage may call for refinishing, and a deeper defect needs a separate assessment. Our residential stone-floor overview explains how care differs across the materials in a home.