Heidi Gustafson is the curator of Ochre Sanctuary, a collection of iron-based earths that are the oldest natural pigments used by humans. In her new Book of Earth, Gustafson details where these pigments come from and how to use them to create art. Here are a few images from the book and the Ochre Sanctuary:
Looks like a gorgeous book. Check out her Instagram for more colorful photos of ochres.
