The search for the perfect jar of clay often feels like a quest for buried treasure. Long before it reaches a bathroom shelf, cosmetic clay is a "mineral stew" born from the erosion of the earth's crust—specifically the breakdown of granite into microscopically fine particles.

: Major chains like Sephora , Ulta , or Nordstrom are ideal if you want to test products or be color-matched for clay-infused makeup before buying.

You can find cosmetic clay in various physical and digital locations: