Egyptian blue

== English == === Etymology === From Egyptian +‎ blue, from being a blue invented by Ancient Egyptians. === Noun === Egyptian blue (countable and uncountable, plural Egyptian blues) A pigment made from calcium copper tetrasilicate (“CaCuSi4O10”), the first artificial pigment, a blue, used by Egyptians for over 3 millennia, before dying out during the Roman Empire; one of the few alternates to lapis lazuli during ancient times. ==== Coordinate terms ==== lapis lazuli Chinese purple / Han purple (the first artificial purple, one of the first artificial pigments) Chinese blue / Han blue Prussian blue (the first artificial pigment widely used in the modern world; not an ancient pigment) ==== Translations ====