Umber

Umber

A brown earth that is darker than ocher and sienna, consisting of iron oxide and oxyhydroxide with manganese oxides, clay, and lime. Highly valued as a permanent pigment, it may be used in its greenish brown natural state (raw umber) or in the dark or reddish brown calcined state (burnt umber). Compare: ocher; sienna.

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Part of Speech: noun
Synonym(s):
Blossary:
Industry/Domain: Mining
Category: General mining; Mineral mining
Government Agency: USBM
Product: Dictionary of Mining, Mineral, & Related Terms - 2nd Edition
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Related terms

umber

Mining; General mining; Mineral mining

A brown earth that is darker than ocher and sienna, consisting of iron oxide and oxyhydroxide with manganese oxides, clay, and lime. Highly valued as a permanent pigment, it may ...

umber

Language; Dictionaries

Of or pertaining to umber; resembling umber; olive-brown; dark brown; dark; dusky.

umber

Arts & crafts; Sculpture

Brown earthen mineral used in coloring glaze and clay in ceramics and pottery.

Cologne umber

Mining; General mining; Mineral mining

An earthy black or brown lignite used as a pigment. Etymol. source near Cologne, Germany.

brown umber

Mining; General mining; Mineral mining

A brown earthy variety of limonite.

asteroid mining

Mining; General mining

The future industry of sending spacecraft to asteroids in order to harvest their natural resources and bring them back to civilization for use. On April 24th 2012, the first real ...

rock

Mining; General mining

A mineral that forms inside the earth as marble and granite are rocks; a huge amount of stone that forms a cliff or mountain is called as rock.

beryl

Mining; General mining

A greenish mineral that usually lets light shine through it and is found mostly in igneous and metamorphic rocks.

corundum

Mining; General mining

A very hard mineral made mainly of aluminum and oxygen. Rubies and sapphires are types of corundum.

feldspar

Mining; General mining

A mineral that makes up more than 60 percent of the Earth's crust. The pink and white flecks in granite consist of feldspar.

geode

Mining; General mining

A hollow, rounded rock that is lined on the inside with crystals is called geode.

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