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Clay earth pigments are naturally occurring minerals, principally iron oxides, that have been used since prehistoric times as pigments. The primary types are
Earth pigments are known for their fast drying time in oil painting, relative inexpensiveness, and lightfastness. Cave paintings done in sienna still survive today.
United Kingdom, New Zealand, New South Wales, Canada, Queensland
Kava, Northern Territory, Tasmania, New South Wales, Arnhem Land
Ancient Egypt, England, Newfoundland and Labrador, Provence, Hue
Caput mortuum, Clay earth pigment, Ferrihydrite, Goethite, Hematite