Aztec Secret Indian Healing Clay,1lb is a natural calcium bentonite clay for deep pore cleaning. Kiss the acne goodbye today and shop at Vitacost for discounts. I have acne prone skin and have had stubborn blackheads on my nose for over a decade. I bought this clay after hearing about bentonite's detoxing properties. How Aztec secret works Indian healing clay clays have been used for centuries to beautify and refresh when used as a facial mask. Cleopatra used clay from the.