Cowboy Coffee Flagstone is a quartzite stone quarried from the Idaho Rockies. It is grey, with mica creating silver and white accents. Stones vary from 1”-2” in thickness. Stones vary greatly in size from ¼ SF to up to 5 SF per piece. On average, 1 Ton will cover 90-125 SF, and there are roughly 1.5 Tons per pallet.