Black manganese

Related to Black manganese: Black copper
(Chem.) the black oxide of manganese, MnO2.

See also: Black

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Chinchorro hunter-gatherers invented the earliest known mummification procedures (mummy coated in black manganese shown here) about 7,000 years ago, when increased rainfall along South America's Pacific coast boosted the availability of freshwater and seafood, spurring a rise in population.
Researchers discovered black manganese pigments in Neanderthal settlements that may have been used to create body decorations - and art is communication and that implies the ability to talk, according to researchers.
The sight's components are solid billet 6061 T6 aluminum, type III hard-anodized matte black and matte black manganese phosphate.
Murray Garner has an ability to capture the naturally occurring phenomenon of sparkling turquoise waters with his alkaline glazes, contrasting colour against a black manganese glaze.
These paintings of animals are usually found deep inside the cave, and are either linear engravings, made with stone tools, or elaborate paintings using iron oxide (to produce a range of colours from yellow to deep maroon) or black manganese dioxide.
Bayferrox 303T iron oxide pigment is a black manganese ferrite and demonstrates improved temperature stability.