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Egyptian blue, also known as calcium copper silicate (CaCuSi 4 O 10 or CaOCuO (SiO 2) 4 (calcium copper tetrasilicate)) or cuprorivaite, [1] is a pigment that was used in ancient Egypt for thousands of years. It is considered to be the first synthetic pigment. [2] It was known to the Romans by the name caeruleum.
Nymphaea spectabilis, a purple form known from cultivation, and N. capensis, found throughout eastern, central and southern Africa, as well as a number of other named taxa, were synonymised to N. nouchali var. caerulea in the 1989 addition to the Flora of Tropical East Africa (FTEA) series, a position which has generally been accepted, [1] [4] [10] [11] although some of the authorities in ...
Blue pigments are natural or synthetic materials, usually made from minerals and insoluble with water, used to make the blue colors in painting and other arts. The raw material of the earliest blue pigment was lapis lazuli from mines in Afghanistan, that was refined into the pigment ultramarine. Since the late 18th and 19th century, blue ...
“Egyptian blue” was a popular pigment of its time that was made using calcium, copper and silicon, according to the Royal Society of Chemistry. The bright blue was highly valued for its rarity ...
A medieval depiction of the coronation of the Emperor Charlemagne in 800 AD wearing royal blue. The bishops and cardinals wear Tyrian purple, and the Pope wears white. A fragment of the shroud in which the Emperor Charlemagne was buried in 814 AD. It was made of gold and Tyrian purple from Constantinople.
Nymphaea nouchali, often known by its synonym Nymphaea stellata, or by common names blue lotus, [3] star lotus, red water lily, dwarf aquarium lily, blue water lily, blue star water lily or manel flower, is a water lily of genus Nymphaea. It is native to southern and eastern parts of Asia, and is the national flower of Bangladesh and Sri Lanka.
Egyptian blue: a synthetic pigment of calcium copper silicate (CaCuSi 4 O 10). Thought to be the first synthetically produced pigment. Han blue: BaCuSi 4 O 10. Azurite: cupric carbonate hydroxide (Cu 3 (CO 3) 2 (OH) 2). Basic copper carbonate: Cu 2 (OH) 2 CO 3. Iron pigments. Prussian blue (PB27): a synthetic inert pigment made of iron and ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 25 September 2024. Variety of the color blue For other uses, see Shades of Blue (disambiguation). "Shade of Blue" redirects here. For the song by Black Rebel Motorcycle Club, see Shade of Blue (song). For the R&B/funk band, see Shade of Blue (band). Blue Wavelength 440–490 nm Common connotations ...