You should not stain any kind of stonework or concrete with a stain designed for wood. One of the requirements of a wood stain is wiping off the excess before it drys. You can not do this with stonework properly. Use a stain designed for stonework such as H & C Stain Sealer. You can get this product at any good paint store or Home Improvement store. I've stained several shuffleboard courts with this sealer and it stands up well to weather and wear. Read the instructions well before you work with it. You will not get a perfect match but try several stains on a scrap piece of limestone before attempting your work on your project.