Which clay is right for your skin? Bentonite, kaolin, calamine & French green

Clay-based soap is one of the oldest, most effective forms of natural cleansing there is. But "clay soap" isn't one product — different clays do genuinely different things. Here's the honest breakdown.

Bentonite clay — the deep pull

Bentonite is volcanic ash that carries a strong negative electrical charge when wet. That charge lets it grab positively-charged impurities — bacteria, heavy metals, environmental grime — and lift them out of pores.

Best for: oily skin, acne-prone areas, deep-pore cleansing. Not for daily use on very dry skin.

Kaolin clay — the gentlest

Kaolin is the mildest clay in skincare. It gently absorbs surface oil without pulling deeper, and it's neutral enough for sensitive, reactive, or mature skin.

Best for: dry, sensitive, mature skin. Safe for daily use.

French green clay — the mineral remineralizer

French green clay is high in iron oxide and other trace minerals. It draws out oil like bentonite but also leaves minerals behind on the skin — a bit like a mask and a cleanser in one.

Best for: combination and oily skin that also feels dull or tired.

Calamine — the calmer

Calamine is a soft pink mineral blend of zinc oxide and iron oxide. Zinc is naturally anti-inflammatory, which is why calamine has been used to calm reactive skin for over a century.

Best for: sensitive, itchy, or seasonally-reactive skin.

Pink clay — the middle ground

Pink clay is a naturally-occurring blend of red and white kaolin. It's cleansing but noticeably gentler than bentonite — a good starting point if you're new to clay soap.

Best for: normal-to-combination skin, anyone easing in.

Quick picker

• Oily / acne-prone → bentonite or charcoal + bentonite combo
• Combination + dull → French green
• Sensitive + reactive → calamine or kaolin
• Dry + mature → kaolin
• Normal, easing in → pink clay