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Ochre
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<p>Ochre , iron ochre, or ocher in <a href="/facts/American_English/sdAfgPgM">American English</a>, is a natural <a href="/facts/Clay_earth_pigment/XE9yaX9Q">clay earth pigment</a>, a mixture of <a href="/facts/Ferric_oxide/vam0XoC5">ferric oxide</a> and varying amounts of clay and sand. It ranges in colour from yellow to deep orange or brown. It is also the name of the colours produced by this pigment, especially a light brownish-yellow. A variant of ochre containing a large amount of <a href="/facts/Hematite/716YBzGr">hematite</a>, or dehydrated iron oxide, has a reddish tint known as red ochre (or, in some dialects, ruddle). </p><p>The word ochre also describes clays coloured with iron oxide derived during the extraction of <a href="/facts/Tin/obW9mqc3">tin</a> and <a href="/facts/Copper/I8PEE8oX">copper</a>. </p>