Rugs are actually helpful in protecting your natural stone floors because they catch much of the grit and dirt that gets tracked in, reducing the potential wear and scratches such detritus can cause. However, there are some precautions you’ll want to take. Use rug holders to prevent the rug from sliding, which is not only hazardous, but can also create the scratches you are trying to prevent. Do not use rugs backed with latex or rubber.