1. Tri-State Stone , Building Supply Inc 8004 Coach St, Potomac, MD 20854 Coordinate: 38.99013,-77.21586 Phone: (301) 983-1815
2. Strosniders Hardware 10110 River Rd, Potomac, MD 20854 Coordinate: 39.01755,-77.20844 Phone: (301) 299-6333