Fuller’s Earth is a clay-like earthy material used to decolorize, filter and purify animal, mineral and vegetable oils and greases. It has a high magnesium oxide content. In the US, two varieties of fuller’s earth are mined. These comprise the minerals montmorillonite or palygorskite or a mixture of the two. Calcite, dolomite and quartz are some of the other minerals that may be present in fuller’s earth. Its important uses are in absorbents and filters. In skin care, fuller’s earth has been used as a facial mask. The average fuller’s earth price is $30 per pound.