My husband and I have a sweat lodge. You move the hot rocks with a pitchfork. You can sweat dry, sprinkle water on the rocks, or pour it on. It's best added slowly. Watch out for exploding rocks! Quartz will explode easily. The rocks will need to be replaced frequently as they crack in the fire, regardless of type. Indigenous people use whatever kind of rock is available. They don't collect and transport sweat lodge rocks over long distances and neither should you. If you get a pile of sandstones hot enough to glow, they'll vaporize sprinkled water for 45 minutes and keep your lodge cooking for much longer than that.
