Which clay is best for oily and acne-prone skin?

Across the reviewers we read, calcium bentonite (as in Aztec Secret) and volcanic clay (as in Innisfree) get the most consistent recommendations for oily and acne-prone skin because of their strong sebum-absorbing capacity. Kaolin-based formulas like SKIN1004 are typically described as gentler and better for combination or sensitive skin that still wants pore care.