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Bone char (Latin: carbo animalis) is a porous, black, granular material produced by charring animal bones. Its composition varies depending on how it is made; however, it consists mainly of tricalcium phosphate (or hydroxyapatite ) 57–80%, calcium carbonate 6–10% and carbon 7–10%. [ 1 ]
Bone is also made of both mineral and carbon-based materials; the mineral-based are calcium, phosphorus, and fluoride; the carbon-based is the protein ossein. Bone also includes the mineral hydroxyapatite, "A calcium phosphate mineral which forms a hard outer covering over the collagen and protein matrix," [1] or organic material.
Archaeological masks have been found from early Paleo-Eskimo and from early Dorset culture period. [2] It is believed that these masks served several functions, including being in rituals representing animals in personalized form; [14] being used by shaman (medicine man or angakkuq) in ceremonies relating to spirits (as in the case of a wooden mask from southwestern Alaska); [15] it is also ...
The Dorset culture, which became culturally distinct around 600 BCE, produced a significant amount of figurative art in the mediums of walrus ivory, bone, caribou antler, and on rare occasion stone. Subjects included birds, bears, walruses, seals, and human figures, as well as remarkably small masks.
Chiwara masks are categorized in three ways: horizontal, vertical, or abstract. In addition, Chiwara can be either male or female. Female Chiwara masks are denoted by the presence of a baby antelope and straight horns. Male Chiwara masks have bent horns and a phallus. The sex of a Chiwara mask is much clearer on horizontal and vertical masks ...
Bone meal (or bonemeal) is a mixture of finely and coarsely ground animal bones and slaughter-house waste products. [1] It is used as a dietary supplement to supply calcium and phosphorus to monogastric livestock in the form of hydroxyapatite. As a slow-release organic fertilizer, it supplies phosphorus, calcium, and a small amount of nitrogen ...
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Animals are common subjects in African masks. Animal masks typically embody the spirit of animals, so that the mask-wearer becomes a medium to speak to animals themselves (e.g. to ask wild beasts to stay away from the village); in many cases, nevertheless, an animal is also (sometimes mainly) a symbol of specific virtues.