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
Acronym-Abbreviation:

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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

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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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