Umber

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Raw umber

Umber is a natural brown clay pigment which contains iron and manganese oxides. The color becomes more intense when calcined (heated), and the resulting pigment is called burnt umber. The name derives from Umbria,^{[citation needed]} a mountainous region of central Italy, but it is found in many parts of the world. Some of the finest umber comes from Cyprus. It has been used as a pigment since prehistoric times.

Chemical formula: Fe₂O₃ + MnO₂ + nH₂O + Si + Al₂O₃

See also: sienna, ochre, clay earth pigment

[edit] External links

• Discussion of umber and its use by Vermeer and other painters

This article about a specific mineral, mineraloid, or rock type is a stub. You can help Wikipedia by expanding it.

Retrieved from "http://en.wikipedia.org../../../u/m/b/Umber.html"

Categories: Articles with unsourced statements since February 2007 | All articles with unsourced statements | Iron oxide pigments | Iron minerals | Manganese minerals | Oxide minerals | Mineral stubs

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• This page was last modified 22:20, 28 March 2007 by Wikipedia user Jeltz. Based on work by Wikipedia user(s) SmackBot, AntiVandalBot, Thijs!bot, NERIUM, YurikBot, Atomobot, Bluebot, Jaraalbe, Andux, Shaddack, AlexChurchill, Pjacobi, Mmm, Msh210, Coolgamer and Stan Shebs and Anonymous user(s) of Wikipedia.
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