Replacing carpet with a darker brown color eventually but first want to add some stone or tile around the fireplace, as it's wood and gas burning. What color and/or type of stone or tile ideas would you all recommended? and would 20" deep/around be enough? The hearth stone area is 20" deep. Our houzz is in the mountains, we do live here full-time and like sort of modern with slightly rustic feel. We have some dark espresso colored furniture that will be on each side, with a dark brown sofa and chairs etc.