A health stone is an inert, porous material resembling a tiny pumice stone. It is used in dab rigs' nails and is also popular in hand pipes.
Insert the vapor stone into the appropriate health stone bowl, but ensure the smaller, tapered side goes in first.
Load your dab onto the vapor stone using a glass or silicone-tipped dabber to avoid scratching the stone, although any dabber will work if used carefully.
Use a small windproof butane torch to melt, not burn, the concentrate on the health stone. Point the tip of the flame at the dab and adjust the distance until it melts and seeps into the porous stone pad.
Since the carbon retains minimal heat, you can inhale from the mouthpiece immediately after heating the dab. Avoid burning the dab to prevent harsh-tasting vapor.