Prussian blue
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Prussian blue is a dark blue pigment produced by oxidation of ferrous ferrocyanide salts. It has the chemical formula Fe43. It consists of Fe3+ cations, where iron is in the oxidation state of +3, and
Sample of prussian blue
The Great Wave off Kanagawa by Hokusai, an artwork that makes extensive use of Prussian blue
Prussian blue in a vial
Simulated powder x-ray diffraction profile for Prussian blue crystal, crystallographic direction annotated. Image generated using CrystalMaker software.
Egyptian blue
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Egyptian blue, also known as calcium copper silicate, calcium copper tetrasilicate, or cuprorivaite, is a pigment with the chemical formula CaCuSi4O10 that was used in ancient Egypt for thousands of y
Prussian blue
…significant since it was the first stable and relatively lightfast blue pigment to be widely used since the loss of knowledge regarding the synthesis of Egyptian blue. European painters had previously used a number of pigments such as indigo dye, smalt, and Tyrian purple, and the extremely expensive ultramarine made…
Egyptian blue
Pyxis made out of "Egyptian blue" faience: Imported to Italy from northern Syria, it was produced 750–700 BC. (Shown at Altes Museum in Berlin)
Blue faience saucer and stand, New Kingdom (1400–1325 BC)