People managing calluses on the feet or heels, thickened skin on elbows and knees, or rough patches on the hands, including pedicure and manicure services, and anyone who prefers manual exfoliation over chemical callus removers or foot peels.

For anyone who wants to avoid chemical callus removers or foot peels, this offers a reusable, chemical-free way to manage genuinely thick callus that a washcloth or scrub can't touch, at a low cost since the stone doesn't wear out with normal home use.

Soak the area to be treated in warm water for several minutes, or use it right after a bath or shower, until the skin has softened. Wet the stone itself before use, never use it dry. Rub it gently over the callused area in small circles or one direction for about two to three minutes, using light to medium pressure, and stop sooner if the skin starts to feel sensitive or tender. Rinse the area, pat dry, and follow with a moisturizer. Rinse the stone after each use and let it air dry fully before storing. Avoid use on broken skin, open wounds, or infected areas, and check with a doctor first if you have diabetes, poor circulation, or neuropathy.

• Pro: a single raw material with no coating that can flake off, so the abrasive surface stays consistent over the life of the stone.
• Pro: reusable indefinitely with just rinsing and drying, rather than a disposable pad or file.
• Con: only works wet, used dry, it drags on skin instead of smoothing it and can cause abrasions.
• Con: as a raw mineral rather than a graded abrasive, there's no fine/coarse option to choose between, and texture can vary slightly stone to stone.