Clay earth pigment Guide, Meaning , Facts, Information and Description
Clay earth pigments are naturally occurring minerals that have been used since prehistoric times as pigments. The primary types are External Links:- http://www.iconofile.com/search_results.asp?subcatid=29 (Starting link; has multiple pages. This is a commercial site, but it has many excellent descriptions and pictures of these and other related materials.)
This is an Article on Clay earth pigment. Page Contains Information, Facts Details or Explanation Guide About Clay earth pigment