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2. Earth pigment - Wikipedia

   en.wikipedia.org/wiki/Earth_pigment

   Earth pigments are naturally occurring minerals that have been used since prehistoric times as pigments. Among the primary types of earth pigments include the reddish-brown ochres, siennas, and umbers, which contain various amounts of iron oxides and manganese oxides. [1] [2] Other earth pigments include the green earth pigments or terres ...

3. Umber - Wikipedia

   en.wikipedia.org/wiki/Umber

   Umber is a natural earth pigment consisting of iron oxide and manganese oxide; it has a brownish color that can vary among shades of yellow, red, and green. [3] : 39 Umber is considered one of the oldest pigments known to humans, first seen in Ajanta Caves in 200 BC – 600 AD. [4] : 378 Umber's advantages are its highly versatile color, warm ...

4. Ochre - Wikipedia

   en.wikipedia.org/wiki/Ochre

   Ochre is a family of earth pigments, which includes yellow ochre, red ochre, purple ochre, sienna, and umber. The major ingredient of all the ochres is iron (III) oxide-hydroxide, known as limonite, which gives them a yellow colour. A range of other minerals may also be included in the mixture: [5] : 134. Yellow ochre ( Goldochre) pigment.

5. Sienna - Wikipedia

   en.wikipedia.org/wiki/Sienna

   Raw sienna is a yellowish-brown natural earth pigment, [1] composed primarily of iron oxide hydroxide. The box shows the color of the pigment in its natural, or raw state. It contains a large quantity of iron oxide and a small quantity (about five percent) of manganese oxide. This kind of pigment is known as yellow ochre, yellow earth, limonite ...

6. Green pigments - Wikipedia

   en.wikipedia.org/wiki/Green_pigments

   Green earth was an olive-green natural pigment widely used in the 14th and 15th centuries. It was often used in Italian painting as an under layer beneath flesh colors, particularly in painting by Duccio .

7. How bones, skulls and feathers illustrate an anthology of ...

   www.aol.com/bones-skulls-feathers-illustrate...

   Indigenous Australian Jan (Djan Nanundie) Billycan, painted this 2006 piece "All the Jila", using natural earth pigments and oil on canvas. - National Gallery of Australia, Canberra/Courtesy Kode ...