(View exact match)limoniteCATEGORY: geology
DEFINITION: Limonite is the catchall name widely applied to hydrous iron oxide minerals. It is more specifically an impure hydrated iron oxide varying in color from dark brown to yellow, colloidal or amorphous in character.
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ochreSYNONYMS OR RELATED TERMS: ocher
DEFINITION: Soft varieties of iron oxide (hematite, limonite, goethite)which were ground and used with other materials in prehistory to make pigment. Ochre occurs naturally and was much used for coloring matter, as in cave art, pottery painting, and personal decoration. Red ochre was certainly used ceremonially to give an impression of life to the corpse during funerary rites. There are many records from the Upper Palaeolithic onwards of ochre staining of skeletons. It was mixed with earth, clay, blood, or grease to make the paint. Ochre was used as crayons or powder in Aurignacian period for paintings on walls of caves or on bone or stone artifacts. It was mainly yellow, brown, black, orange, and red (hematite).